add newsraft

Still not rebuilding on changes to $dir/$dir/$file.md.

Makefile

@@ -0,0 +1,95 @@
+MAKEFLAGS += -j
+MAKEFLAGS += -s
+EDITOR ?= vi
+FZF != command -v sk || command -v fzy || command -v fzf || \
+	{ echo install a fuzzy finder && exit 1 ;}
+
+spill_contents = sed -e '1,/---/d'
+
+help: .git/info/exclude ## Print the help message
+	@awk 'BEGIN {FS = ":.*?## "} /^[0-9a-zA-Z._-]+:.*?## / {printf "\033[36m%s\033[0m : %s\n", $$1, $$2}' $(MAKEFILE_LIST) | \
+		sort | \
+		column -s ':' -t
+
+articles != find * -type f -name "*.md"
+
+dirs != ls -d */
+categories = $(patsubst %/, %, $(dirs))
+
+databases = $(patsubst %, .dbs/%.rec, $(categories))
+
+default += $(databases)
+default += db.rec
+default += .dbs/map.fmt
+
+$(foreach dir, $(categories), \
+	$(eval .dbs/$(dir).rec: $(wildcard $(dir)/*)) \
+	)
+
+.dbs/:
+	mkdir $@
+
+$(databases): .dbs/%.rec: %/ | .dbs/
+	$(info making $(@F))
+	for entry in $(shell find $< -type f -name "*.md") ; do \
+		printf "file: %s\n" "$$entry" ;\
+		sed -n '2,/^---$$/ {/^---$$/d; p}' "$$entry"  |\
+		tr -d '[]' | tr -s ' ' |\
+		sed '/tags: /s/, /\ntag: /g ; s/tags:/tag:/ ; /requires/s/, /\nrequires: /g' ;\
+		printf "wordcount: %s\n\n" "$$(wc -w < $$entry)" ;\
+	done > $@
+
+# This two-variable read can only happen because of the quotes in the titles.
+db.rec: $(databases)
+	$(info rebuilding from $? )
+	printf '%s\n' '%rec: guide' > $@
+	printf '%s\n' '%key: title' >> $@
+	printf '%s\n' '%type: requires rec guide' >> $@
+	printf '%s\n' '%type: provides rec guide' >> $@
+	printf '%s\n' '%type: wordcount int' >> $@
+	printf '%s\n\n' '%sort: wordcount' >> $@
+	cat $^ >> $@
+	recsel $@ -e "requires != ''" -CR title,requires |\
+	while read title requires; do \
+		for provider in "$$requires" ; do \
+			recset $@ -e "title = '$${provider}'" -f provides -a "$${title}" ;\
+		done ;\
+	done
+	sed -i 's/"//g' $@
+	recfix --sort $@
+	$(info Created main database: $@)
+
+.git/info/exclude: $(default)
+	@echo $^ | tr ' ' '\n' > $@
+
+default += .git/info/exclude
+
+.PHONY: database
+database: $(default) ## Make a recfiles database
+
+.PHONY: article
+article: ## Write an article
+	@path=$$(find $(categories) -type d | sort | uniq | $(FZF)) ;\
+	read -p "Title: " title ;\
+	filename="$$(echo "$$title" | tr '[:upper:]' '[:lower:]' | tr ' ' '_')" ;\
+	printf '%s\n' '---' >> $$path/$$filename.md ;\
+	printf 'title: "%s"\n' "$$title" >> $$path/$$filename.md ;\
+	printf 'tags: [ "%s" ]\n' "$$path" | tr '[:upper:]' '[:lower:]' | sed 's#\/#", "#g' >> $$path/$$filename.md ;\
+	printf '%s\n\n' '---' >> $$path/$$filename.md ;\
+	$(EDITOR) +5 "$$path/$$filename.md"
+
+.dbs/map.fmt:| .dbs/
+	printf '%s\n' '[ {{requires[0]}} ] --> [ {{title}} ] {border-style: dashed;}' > $@
+	printf '%s\n' '[ {{requires[1]}} ] --> [ {{title}} ] {border-style: dashed;}' >> $@
+	printf '%s\n' '[ {{requires[2]}} ] --> [ {{title}} ] {border-style: dashed;}' >> $@
+	printf '%s\n' '[ {{requires[3]}} ] --> [ {{title}} ] {border-style: dashed;}' >> $@
+	printf '%s\n' '[ {{requires[4]}} ] --> [ {{title}} ] {border-style: dashed;}' >> $@
+
+.PHONY: map
+map: db.rec .dbs/map.fmt ## Show knowledge dependency map
+	recsel -t guide $< -e 'requires != ""' -p title,requires | recfmt -f .dbs/map.fmt |\
+	grep -vF '[  ]' | graph-easy --boxart | $${PAGER}
+
+.PHONY: clean
+clean: ## Remove all generated files
+	$(RM) $(default)

README.md

@@ -1,73 +1,101 @@
 ---
-title: "Knowledge Base"
+title: "Linux Knowledge Base"
 ---
 
-# Linux Knowledgebase
+The Linux Knowledge-Base provides quick-start guides for working with terminal programs.
 
-This is a list of quickstart guides for Linux programs, designed to get the user up and running as fast as possible.
+If you like this style of short articles with a miniature database, then join me in my quest to remove the nausea of poorly-written documentation.
+
+# Setup
+
+Install `make`, `recutils`, and any fuzzy-finder (i.e. `sk`, `fzy`, or `fzf`).
+
+## Usage
+
+Set up the database and try a few queries:
+
+```sh
+make
+make database
+
+recsel db.rec -m 3
+recsel db.rec -q database
+recsel db.rec -e "title = 'ssh'"
+recsel db.rec -e "title ~ 'ssh'"
+recsel db.rec -e "title ~ 'bash'" -R title,wordcount
+
+recsel db.rec -t guide -j provides -G title \
+    -e "title = 'ssh'" \
+    -p 'sum(provides_wordcount)'
+```
 
 # Style
 
-## Praxis Only
+## No History, No Context
 
-We leave theory alone as much as possible.
+- Nobody cares about how the project started.
-The documentation should be of the form 'if you want *X*, type *Y*'.
+- Nobody wants to read what `ffmpeg` is, because anyone who wants to use it already knows what it is.
 
-We don't need to explain what a program does - anyone looking up 'how to X', already knows what they want to do.
+## State Knowledge Dependencies
-We don't even need to explain which program to use - if someone wants to combine an mp4 and webm video into a single video file, they only care about that result, not about learning `ffmpeg`.
 
-Any interest in these tools only comes after we can use them.
+Articles should state what you need to understand in order to read them *at the start*.
+They should not assume the reader knows much beyond common terminal commands, and should not provide a link to some other resource half-way through an article.
 
-## Chronological
+People should be able to read an article from the beginning, then keep going until the end, and then stop.
+Articles should not take a detour through a chain of other articles of unknown size.
 
-Entries should read like scripts - everything in the right order, with small notes on what this does.
+[Do not Jaquays documentation](https://splint.rs/posts/no_links)
 
-The chronology should never branch.
+## Be Opinionated
-If `gitea` can use three different types of database, the documentation should simply pick one and continue instructions from there.
-Repetition works better than a reference - if a database requires three commands to set up, it's better to repeat those three commands for every program that requires a database than to just link to another file which discusses databases.
 
-### Closing
+- Guides should not ask the reader to select options half-way through.
+- Options for different filesystems, databases, et c., should be written as separate guides.
 
-Introductory documents should show anything required to cleanly uninstall a program, without leaving bulky configuration files behind.
+## Repetition Beats Reference
 
-## Three Input Types
+If a database requires three commands to set up, it's better to repeat those three commands for every program that requires a database than to just link to another file which discusses databases.
 
-There are three types of examples:
+## Show Arguments as Variables
 
-Fixed input:
+Look at this line:
 
-```bash
+```sh
-ls
+grep ls --color=always  $HISTFILE | less -R
 ```
 
-Anything with arbitrary input should be shown as a variable.
+What else can go in place of `always`?
+Can you say `--color=red`?
+Can you put anything?
+The answer is not obvious.
 
-```bash
+What about this line:
-ls $FILE
+
+```sh
+git branch new
+git checkout new
 ```
 
-Non-commands (e.g. output) should be shown as quoted text:
+Do you always use `new`?
+Can you use another word here?
+The answer is not obvious.
 
-> LK           img
+It's better to make all arbitrary values variables.
-> Mail         kn
-> Projects     music
-
-# Example
-
-```
-How to see which websites you're actively accessing:
-
-` ` `bash
-ss -tr dst :$PORT
-` ` `   
-
-> State  Recv-Q  Send-Q   Local Address:Port                                    Peer Address:Port   Process  
-> ESTAB  0       0         192.168.0.14:42476                                 149.154.167.91:https           
-> ESTAB  0       0         192.168.0.14:43644                                  104.17.90.199:https           
 
+```sh
+git branch $branch_name
+git checkout $branch_name
+PAGER='less -R'
+grep ls --color=always $HISTFILE | $PAGER
 ```
 
-# What's wrong with everything else?
+Now we can see what can be changed.
+
+## Assume People Follow the Instructions
+
+Articles should say what to type, not the output.
+If the command is `ls`, users will see files once they try the command, but the article does not need to provide an example list of files unless an important point has to be made about output.
+
+# What's Wrong with Everything Else?
 
 ## Man pages
 
@@ -75,12 +103,14 @@ ss -tr dst :$PORT
 - Often presumes you know everything except that one program.
 - Often written in the 80's, and it shows.
 - Zero respect for your time.
+- Often references `info` pages (yuck).
 
-## curl cheat.sh/
+## `curl cheat.sh`
 
 - Doesn't have the programs I like.
 - Too short to get you started on many programs.
 - Poor understanding of priority (`git stash` is covered before `git commit`).
+- Repetitive
 
 # Current State
 

_index.md

@@ -1,6 +0,0 @@
----
-title: "Linux Knowledge Base"
----
-
-{{< ticks >}}
-{{< /ticks >}}

basics/at.md

@@ -1,46 +1,46 @@
 ---
 title: "at"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics", "time" ]
 ---
 Install with:
 
-```bash
+```sh
 sudo apt install at
 ```
 
 Enable the daemon service with:
 
-```bash
+```sh
 sudo systemctl enable --now atd
 ```
 
 Then jobs can be specified with absolute time, such as:
 
-```bash
+```sh
 at 16:20
 ```
 
-```bash
+```sh
 at noon
 ```
 
-```bash
+```sh
 at midnight
 ```
 
-```bash
+```sh
 at teatime
 ```
 
 Type in your command, e.g.:
 
-```bash
+```sh
 touch /tmp/$FILE.txt
 ```
 
 The jobs can also be specified relative to the current time:
 
-```bash
+```sh
 at now +15 minutes
 ```
 
@@ -50,7 +50,7 @@ Finally, accept the jobs with ^D.
 
 Display a list of commands to run with:
 
-```bash
+```sh
 atq
 ```
 
@@ -58,7 +58,7 @@ atq
 
 This will print all pending IDs.  Remove a job by the ID with:
 
-```bash
+```sh
 atrm 2
 ```
 
@@ -68,7 +68,7 @@ Check `/var/spool/atd/` to see the jobs.
 
 Automatically add a job for later, by setting the date, then using echo for the command.
 
-```bash
+```sh
 t="$(date -d "2 minutes" +%R)"
 echo "fortune > ~/$FILE" | at "$t"
 watch cat $FILE

basics/basics.md

@@ -1,6 +1,6 @@
 ---
 title: "Basics"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 
 You need about a dozen commands to move around Linux.
@@ -9,13 +9,13 @@ Don't worry about understanding any of it, just type it in and the habit forms p
 
 You start in a dark room. You want to know where you are by **p**rinting out your **w**orking '**d**irectory' (i.e. 'location'):
 
-```bash
+```sh
 pwd
 ```
 
 Have a look at what is here:
 
-```bash
+```sh
 ls
 ```
 
@@ -23,11 +23,11 @@ If you get no response, the list of items is "", meaning "nothing here".
 
 Have a look at **a**ll the files:
 
-```bash
+```sh
 ls -a
 ```
 
-```bash
+```sh
 . ..
 ```
 
@@ -35,38 +35,38 @@ So `.` means 'here' and `..` means 'you see stairs leading downwards' (e.g. 'the
 
 Change directory (`cd`) down one level:
 
-```bash
+```sh
 cd ..
 ```
 
 Look where you are again with `pwd`, then go back up.  Use `ls`, and if you see `bob`, then:
 
-```bash
+```sh
 cd bob
 ```
 
 Move around the directories.  The place at the bottom is the 'root', and is known as `/`.  Go to the root:
 
-```bash
+```sh
 cd /
 ```
 
 Do `ls` again and `cd` into `etc`.  Look at how much space those folders are taking up:
 
-```bash
+```sh
 du iptables
 ```
 That's the number of kilobytes the file is taking up.
 Do the same again, but in a human-readable format:
 
-```bash
+```sh
 du -h iptables
 ```
 
 The `du` program has `-h` for 'human', '-s' for 'short', and a bunch of other commands.
 Have a look at the manual and try another command:
 
-```bash
+```sh
 man du
 ```
 
@@ -74,7 +74,7 @@ Once you're done, press 'q' to quit the manual page and try the extra `du` flag
 
 Now you can try to gain super-powers and take over the system:
 
-```bash
+```sh
 sudo -i
 ```
 
@@ -82,61 +82,61 @@ At this point, you are 'root'.
 All your commands will be executed, even if they're unsafe, or even if you ask to delete the entire machine.
 Best to exit out of the root account:
 
-```bash
+```sh
 exit
 ```
 
 Go find a file that isn't a directory.  You can tell which is which with:
 
-```bash
+```sh
 ls -l
 ```
 
 A directory starts with a 'd', like this:
 
-```bash
+```sh
 drwxr-xr-x 79 root root 4096 Jan  3 05:15 /etc/
 ```
 
 A standard file starts with '-', like this:
 
-```bash
+```sh
 `-rw-r--r-- 1 root root 8 Dec 11 17:26 hostname`
 ```
 
 Look inside the file /etc/hostname to find out your computer's name:
 
-```bash
+```sh
 cat /etc/hostname
 ```
 
 Print out the words "hello world":
 
-```bash
+```sh
 echo "hello world"
 ```
 
 Move back to your home directory:
 
-```bash
+```sh
 cd
 ```
 
 Take the words 'hello world', and put them in 'my_file':
 
-```bash
+```sh
 echo 'hello world' > my_file
 ```
 
 Measure the disk usage of that file, then put the results at the bottom of the file:
 
-```bash
+```sh
 du $FILE >> $FILE
 ```
 
 And check the results:
 
-```bash
+```sh
 cat $FILE
 ```
 
@@ -148,7 +148,7 @@ Press tab after typing a few keys and bash will guess what you're trying to  typ
 
 Look at your file's owner:
 
-```bash
+```sh
 ls -l $FILE
 ```
 
@@ -156,19 +156,19 @@ If it says `-rw-r--r-- 1 root root 8 Dec 11 17:26 hostname` then the file is own
 
 Take your file and change the owner to root:
 
-```bash
+```sh
 sudo chown root $FILE
 ```
 
 Change the same file so it's owned by the group 'audio':
 
-```bash
+```sh
 sudo chown :audio $FILE
 ```
 
 Check you did that correctly:
 
-```bash
+```sh
 ls -l my_file
 ```
 
@@ -176,7 +176,7 @@ ls -l my_file
 
 Read the start of that line.  Root can 'read' and 'write' to or delete the file.  Try to remove (delete) it:
 
-```bash
+```sh
 rm $FILE
 ```
 
@@ -184,32 +184,32 @@ You'll see you're not allowed, because you don't own it.
 
 Look at which groups you're in:
 
-```bash
+```sh
 groups
 ```
 
 Change the file so that members of the audio group can write to the file:
 
-```bash
+```sh
 sudo chmod g+w $FILE
 ```
 
 Check you got it right with `ls -l`:
 
-```bash
+```sh
 -rw-rw-r-- 1 root audio 0 Jan  3 19:20 my_file
 ```
 
 Try to delete the file again:
 
-```bash
+```sh
 rm my_file
 ```
 
 If you can't, you're not in the audio group.  Add yourself.  You'll need to *modify* your *user account*, by **a**ppending 'audio' to your list of groups.
 Use `-a` to **a**ppend, and `-G`, to say you're modifying groups:
 
-```bash
+```sh
 sudo usermod -a -G audio [ your username here ]
 ```
 
@@ -219,19 +219,19 @@ Now you should be able to remove (delete) the file.  Remember, that using 'rm fi
 
 Make a directory called 'new test':
 
-```bash
+```sh
 mkdir 'new test'
 ```
 
 Make two directories, called 'A', and 'Z':
 
-```bash
+```sh
 mkdir A Z
 ```
 
 Make a single directory called 'A Z'
 
-```bash
+```sh
 mkdir 'A Z'
 ```
 
@@ -239,19 +239,19 @@ mkdir 'A Z'
 
 Measure the disk usage of everything ('\*' means 'everything'), and put it in a file called 'disk usage.txt':
 
-```bash
+```sh
 du -sch * > A/'disk usage'.txt
 ```
 
 Look at your file:
 
-```bash
+```sh
 cat A/'disk usage.txt'
 ```
 
 If you think you have too much information, use `grep` to just get the one line of text you want:
 
-```bash
+```sh
 grep total A/disk\ usage.txt
 ```
 
@@ -259,7 +259,7 @@ The `grep` program also has a manual ('man page').  You should find out what tha
 
 Start the manual:
 
-```bash
+```sh
 man du
 ```
 
@@ -267,7 +267,7 @@ Then search for `-c` by pressing `/`.  Your final keys should be `man du`, then
 
 Find out if the `ls` program also has a 'human readable' format by using `grep` to search for the word 'human':
 
-```bash
+```sh
 man ls | grep human
 ```
 
@@ -275,25 +275,25 @@ Now use that flag that you've found in combinatin with the `-l` flag to look at
 
 Remove the directory 'Z':
 
-```bash
+```sh
 rmdir Z
 ```
 
 Remove the directory 'Z':
 
-```bash
+```sh
 rmdir Z
 ```
 
 And then remove all the rest:
 
-```bash
+```sh
 rmdir *
 ```
 
 The 'A' directory will not budge because it's not empty.  Remove it recursively, so the computer will remove the things inside the directory as well as the directory itself:
 
-```bash
+```sh
 rm -r A
 ```
 
@@ -303,11 +303,11 @@ You get a package manager which installs programs, fonts, et c.
 If you're on something like Debian, you'll have `apt`, or if you're on something like Red Hat, you'll have `yum`.
 If unsure, ask where a program is:
 
-```bash
+```sh
 whereis yum
 ```
 
-```bash
+```sh
 whereis apt
 ```
 
@@ -315,14 +315,14 @@ If you get a hit, you can use whatever program that is to install things.
 
 Set a reminder of your package manager:
 
-```bash
+```sh
 echo my package manager is yum | lolcat
 ```
 
 If that failed it's because you don't have `lolcat` installed.
 Install lolcat:
 
-```bash
+```sh
 sudo apt install lolcat
 ```
 
@@ -330,23 +330,24 @@ Try the same command again.
 
 Search for things you want, like `libreoffice`, or `gimp`:
 
-```bash
+```sh
 apt search libreoffice
 ```
 
 ... then install one of them with:
 
-```bash
+```sh
 apt install $PROGRAM
 ```
 
 Remove `lolcat`, because it's useless:
 
-```bash
+```sh
 sudo apt remove lolcat
 ```
 
-... and that's pretty much it.  You can move, create, destroy, install things, and look things up.
+...and that's pretty much it.
+You can move, create, destroy, install things, and look things up.
 
 # Review
 

basics/clock.md

@@ -1,41 +1,41 @@
 ---
 title: "clock"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics", "time" ]
 ---
 
 Show system time:
 
-```bash
+```sh
 date
 ```
 
 Show hardware time:
 
-```bash
+```sh
 sudo hwclock -r
 ```
 
 Change system time to match hardware time:
 
-```bash
+```sh
 sudo hwclock --hctosys
 ```
 
 Change hardware time to match system time:
 
-```bash
+```sh
 sudo hwclock --systohc
 ```
 
 Manually set the hardware time to a specified date:
 
-```bash
+```sh
 sudo hwclock --set --date="8/25/19 13:30:00"
 ```
 
 ## Normal Date
 
-```bash
+```sh
 date +%d/%m/%y
 ```
 
@@ -45,7 +45,7 @@ Computers started counting time on January 1st, 1970, and added one second-per-s
 
 Track the time in Unix-time:
 
-```bash
+```sh
 date +%s
 ```
 
@@ -55,13 +55,13 @@ Servers which take their time from an observatory we call Stratum 1 servers.  Se
 
 Install ntp with:
 
-```bash
+```sh
 sudo apt-get install -y ntp
 ```
 
 The shell command for this is `ntpq`.  Monitor the service providers using:
 
-```bash
+```sh
 ntpq -p
 ```
 

basics/column.md

@@ -0,0 +1,36 @@
+---
+title: "column"
+tags: [ "basics", "format", "json" ]
+---
+
+Put output into column.
+
+```sh
+du -h /etc/* | column
+```
+
+Reformat file with an explicit separator (`-s`):
+
+```sh
+column -ts: /etc/passwd
+```
+
+Give columns names (`-N`), so you can hide some (`-H`):
+
+```sh
+column -ts: -N User,PW,UID,GID,Description,Home,shell -H PW,GID /etc/passwd
+```
+
+Reorder with `-O` (unspecified items remain):
+
+
+```sh
+column -ts: -N User,PW,UID,GID,Description,Home,shell -H PW,GID -O User,Description,shell /etc/passwd 
+```
+
+Output to json format with `-J`:
+
+```sh
+column -J -ts: -H PW,GID,shell -N User,PW,UID,GID,Description,Home,shell /etc/passwd
+```
+

basics/conditionals.md

@@ -1,6 +1,6 @@
 ---
 title: "conditionals"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 # If statements
 
@@ -46,7 +46,7 @@ esac
 # While and Until
 This prints from 1 until 9.
 
-```bash
+```sh
 COUNTER=1
 while [ $COUNTER -lt 2 ]; do
         > ((COUNTER++))
@@ -58,7 +58,7 @@ There's also 'until', which stops when something is true, rather than keeping go
 
 # For
 
-```bash
+```sh
 for i in $( ls ); do
 > 	du -sh $i
 > done
@@ -70,19 +70,19 @@ The sequences tool counts up from X in jumps of Y to number Z.
 
 Count from 1 to 10.
 
-```bash
+```sh
 seq 10
 ```
 
 Count from 4 to 11.
 
-```bash
+```sh
 seq 4 11
 ```
 
 Count from 1 to 100 in steps of 5.
 
-```bash
+```sh
 seq 1 5 100
 ```
 

basics/cron.md

@@ -1,135 +0,0 @@
----
-title: "cron"
-tags: [ "Documentation", "Basics" ]
----
-# Cron
-
-The crontab program might have various names, like `cronie` or `crond`.
-
-```bash
-sudo apt search -n ^cron
-```
-
-Once installed, search for the service name, and start it.
-
-```bash
-sudo systemctl list-unit-files | grep cron
-```
-
-```bash
-sudo systemctl enable --now cron
-```
-
-You can *e*dit your crontab with:
-
-```bash
-crontab -e
-```
-
-
-> 39 */3 * * * /usr/bin/updatedb
-
-## Syntax
-
-`* * * * *`
-
-These five points refer to:
-
-`minute hour day month weekday`
-
-So '3pm every Sunday' would be:
-
-> 0 15 * * 7
-
-Here 'Sunday' is indicated by "7", and '3pm' is 'the 15th hour'.
-The minute is '0' (i.e. '0 minutes past three pm').
-
-Doing the same thing, but only in February, would be:
-
-> 0 15 * 2 7
-
-### Full Paths
-
-Executing something requires the full path to where it is, so you cannot simply use `apt update -y`, because cron does not know where `apt` is.
-Instead, find out where it is:
-
-```bash
-type -P apt
-```
-
-`/usr/bin/apt`
-
-Then put that into the crontab:
-
-```bash
-sudo crontab -e
-```
-
-> 40 */3 * * * /usr/bin/apt update -y
-
-This will run `apt update -y` as root every 3 hours, at 40 minutes past the hour, e.g. 00:40, 03:40, 06:40.
-
-## Directories
-
-You can execute a script as root by putting it into a directory, instead of in the tab.
-Look at the available cron directories:
-
-```bash
-ls /etc/cron.\*
-```
-
-### Testing with runparts
-
-Run-parts runs all executable scripts in a directory.
-
-```bash
-run-parts /etc/cron.hourly
-```
-
-## Tips
-
-### Variables
-
-Add your `$HOME` to crontab to use scripts.
-First add `HOME=/home/user`, then you can use syntax like this:
-
-0 * * * * $HOME/.scripts/myScript.sh
-
-*Remember to test the script by executing that line first*:
-
-```bash
-$HOME/.scripts/myScript.sh
-```
-
-You can also add your regular path to your crontab as a variable (see example below).
-If you're using vim as the editor, just run this at the top of your crontab:
-
-```bash
-:r!echo PATH=$PATH
-```
-
-### `date` Commands
-
-Cron doesn't understand the `%` sign, so if you want to use `date +%R`, then it should be escaped with a backslash: `date +\%R`.
-
-### File Location
-
-The crontab files are in `/var/spool/cron/`, so you can backup or restore them.
-
-# Example
-
-```
-HOME=/home/user
-PATH=/usr/condabin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/home/user/.local/bin:/home/user/.scripts/:/home/user/.local/bin:/home/user/.scripts/
-
-1 0 1 * *    /usr/bin/mkdir -p $HOME/arc/$(date +\%Y/\%m)
-
-18 0 1 */3 * $HOME/.scripts/mail-clean.sh
-
-* * * * * ping -c 1 home || mail-pull.sh
-
-50 18 * * * /usr/bin/timeout 30m /usr/bin/syncthing
-
-```
-
-

basics/eval.md

@@ -0,0 +1,22 @@
+---
+title: "eval"
+tags: [ "basics" ]
+---
+
+Compose a statement for execution.
+
+```sh
+x='echo $y'
+echo $x
+y=dragon
+eval "$x"
+```
+
+The results remain in the current shell, unlike sub-shells.
+
+```sh
+b=basilisk
+sh -c 'echo $b'
+eval "g=goblin"
+echo $g
+```

basics/games.md

@@ -0,0 +1,11 @@
+---
+title: "bash games"
+tags: [ "games" ]
+---
+
+Games are a great way to learn bash.
+
+- `mapscii.me` is an interactive terminal map.
+    1. Install telnet.
+    1. `telnet mapscii.me`
+- [Over the Wire](https://overthewire.org/wargames) teaches bash with small challenging you can do over `ssh`.

basics/hard_links.md

@@ -0,0 +1,38 @@
+---
+title: "hard links"
+tags: [ "basics", "links" ]
+---
+
+A hard link is one file which exists in multiple locations.
+
+Each file has an ID, which is kept on the hard disk's partition.
+Each hard link has the same ID, because they are the same file.
+This ID is called the 'inode'.
+
+Create a file, and a hard link:
+
+```sh
+fortune > $file_1
+mkdir -p x/y/z/
+ln $file_1 x/y/z/$file_2
+```
+Have a long look at the file with the `-l` flag, and check the inode with `-i`:
+
+```sh
+ls -li $file_1 x/y/z/$file_2
+```
+
+Since they are the same file, you can make a change to one, and it changes both:
+
+```sh
+fortune | tee x/y/z/$file_2
+cat $file_1
+cat x/y/z/$file_2
+```
+
+# Danger Zone
+
+- hard links will not work on directories, only standard files and fifos.
+- `git` will destroy and remake files, so it will not respect hard links.
+- Files cannot have a hard link on another disk partition, because the inode is stored on each partition.
+

basics/joyous_ascii.md

@@ -0,0 +1,25 @@
+---
+title: "Joyous ASCII"
+tags: [ "fun" ]
+---
+
+- `asciiquarium`
+- `cbonsai -lim "$(fortune)"`
+
+```sh
+cow=$(cowsay -l | sort -R | head  -1)
+fortune -s | figlet | cowsay -nf $cow | lolcat
+```
+
+Watch the [Collatz Conjecture](https://en.wikipedia.org/wiki/Collatz_conjecture) collapse:
+
+```sh
+x="$(du -sc ~/.cache | tr -d '[:alpha:]' | tail -1)"
+until [ "$x" -eq "1" ]; do
+    test "$(( x % 2 ))" -eq 0 && x=$(( x / 2 )) || \
+        x=$(( x * 3 + 1 ))
+    clear -x
+    figlet "$x" | lolcat
+    sleep 1
+done
+```

basics/kernel.md

@@ -1,34 +0,0 @@
----
-title: "kernel"
-tags: [ "Documentation", "Basics" ]
----
-## Living Space
-
-Kernel modules live in lib/modules/$(uname -r)
-
-## Change
-
-Load them with
-
-```bash
-sudo modprobe ath9k
-```
-
-Or remove one with
-
-```bash
-sudo modprove uvcvideo
-```
-
-The PC's irritating speaker beep can be really annoying. Disable it with:
-
-```bash
-sudo modprobe -r pcspeaker
-```
-
-Permanently disable a module by blacklisting it in `/etc/modprobe.d`:
-
-```bash
-echo 'blacklist pcspkr' > /etc/modprobe.d/*nobeep*.conf
-```
-

basics/kill.md

@@ -1,13 +1,13 @@
 ---
 title: "kill"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 
 If you want to kill a program in a graphical environment, open a terminal and type:
 
 # Graphical Programs
 
-```bash
+```sh
 xkill
 ```
 
@@ -17,7 +17,7 @@ Then click on the application which you want to kill.
 
 To kill a program, find it with:
 
-```bash
+```sh
 pgrep discord
 ```
 
@@ -25,7 +25,7 @@ This will give you the UUID, e.g. `19643`.
 
 Kill the program with:
 
-```bash
+```sh
 kill 19643
 ```
 
@@ -33,7 +33,7 @@ kill 19643
 
 To see an ordered list of termination signals:
 
-```bash
+```sh
 kill -l
 ```
 
@@ -49,7 +49,7 @@ Higher numbers are roughly equivalent to insistence.
 
 For example:
 
-```bash
+```sh
 kill -1 3498
 ```
 
@@ -57,7 +57,7 @@ This roughly means 'maybe stop the program, if you can, maybe reload'.
 
 Or the famous:
 
-```bash
+```sh
 kill -9 3298
 ```
 

basics/links.md

@@ -1,19 +1,9 @@
 ---
 title: "links"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics", "links" ]
 ---
-Link from X to Y.
 
-```bash
+There are two types:
-ln -s X ../otherdir/Y
-```
-
-If you want a hard link, this will make a single file exist in two locations.
-If it is deleted in one location, it continues to exist in the other.
-
-```bash
-ln *X* *Y*
-```
-
-Both files must be on the same hard drive, as they have the same inode (check this with `ls -i file`).
 
+- [Soft links](soft_links.md)
+- [Hard links](hard_links.md)

basics/locale.md

@@ -1,6 +1,6 @@
 ---
 title: "locale"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics", "time" ]
 ---
 
 Your locale tells the computer your location, preferred time-and-date format, standard language, papersize, et c.
@@ -8,25 +8,25 @@ A list of supported locales is available at /usr/share/i18n/SUPPORTED
 
 See a full list with:
 
-```bash
+```sh
 cat /usr/share/i18n/SUPPORTED
 ```
 
 Take the first portion to generate full locale information for a region:
 
-```bash
+```sh
 locale-gen ru_RU.UTF-8
 ```
 
 Then use this for the current shell session with
 
-```bash
+```sh
 LANG=ru_RU.utf8
 ```
 
 Expand this to the entire system with: 
 
-```bash
+```sh
 export LANG=ru_RU.utf8
 ```
 
@@ -34,7 +34,7 @@ You can make this permanent for one user by adding this line to the ~/.profile o
 
 Make it permanent for the entire system by editing:
 
-```bash
+```sh
 sudo vim /etc/defaults/locale
 ```
 

basics/locating.md

@@ -1,41 +1,33 @@
 ---
 title: "locating"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 # Type
 
 `type` shows what kind of thing you're running, be it an alias, function, or binary program.
 
-```bash
+```sh
-type cmus
+type cd
+type ls
+type -P ls
+type -a cat
 ```
 
 # Whereis the Program
 
-Ask where the `angband` program is, along with all its configuration files:
+Where is `grep` and all its configuration files?
 
-`whereis angband`
+```sh
-
+whereis grep
-Also `which` shows where a binary file (the program) is, 
-
-```bash
-which cmus
 ```
 
-# Quick Search for Files
+Which one of these is the binary file which you actually use?
 
-You'll need to set up `locate` for this by installing `mlocate`.
+```sh
-`mlocate` needs a list of all files on the machine, so run:
+which grep
-
-```bash
-sudo updatedb
 ```
 
-Then to find a file called 'my-cats.jpg', run:
+# More
 
-```bash
+- [Search instantly with `plocate`](data/search_system.md)
-locate cats
-```
-
-For best results, run `updatedb` regularly, perhaps in crontab.
 

basics/ls.md

@@ -0,0 +1,46 @@
+---
+title: "ls"
+tags: [ "basics" ]
+---
+
+Firstly, your `ls` is probably aliased to something.
+
+Check it with:
+
+
+```sh
+alias ls
+```
+If the prompt shows some alias, then start by removing it:
+
+
+```sh
+unalias ls
+```
+
+Now we can begin.
+
+Check the most recently modified file:
+
+
+```sh
+ls -t
+```
+
+Reverse this with `tac` to see the file which has been unmodified the longest:
+
+
+```sh
+ls -t | tac
+```
+Group files by extension:
+
+```sh
+ls -X
+```
+Sort largest files first:
+
+```sh
+ls -X
+```
+

basics/processes.md

@@ -1,36 +1,36 @@
 ---
 title: "processes"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 # Proccesses
 
 See running items in current terminal with 
 
-```bash
+```sh
 ps
 ```
 
 or more with 
 
-```bash
+```sh
 ps -a
 ```
 
 Or the entire system with
 
-```bash
+```sh
 ps -e
 ```
 
 Or the entire system with more information, BSD style, with:
 
-```bash
+```sh
 ps aux
 ```
 
 And then search for a particular program with 
 
-```bash
+```sh
 ps aux | grep cmus
 ```
 
@@ -40,19 +40,19 @@ Pause a job with ^z.  Put it in the background with the '&' suffix.
 
 List jobs in the current shell with
 
-```bash
+```sh
 jobs
 ```
 
 And then you can pull number 1 up again with 
 
-```bash
+```sh
 fg 1
 ```
 
 Or continue running a stopped job with:
 
-```bash
+```sh
 bg 1
 ```
 
@@ -62,31 +62,31 @@ This changes how nice a program is, from -20 to 19.
 
 Install a program, but nicely, at nice value '10':
 
-```bash
+```sh
 nice -10 sudo apt -y install libreoffice
 ```
 
 Aggressively use Steam, with a nice value of '-13'.
 
-```bash
+```sh
 nice --13 steam&
 ```
 
 Find out that Steam's fucking everything up, so you change its nice value with 'renice':
 
-```bash
+```sh
 renice --5 -p 3781
 ```
 
 Nerf all of roach-1's processes:
 
-```bash
+```sh
 renice 10 -u roach-1
 ```
 
 ... or the entire group
 
-```bash
+```sh
 renice -14 -g hackers
 ```
 

basics/setup/quality_of_life.md

@@ -0,0 +1,186 @@
+---
+title: "Quality of Life"
+tags: [ "basics", "setup" ]
+dependencies: [ "vi", "basics" ]
+---
+
+This & That
+===========
+
+Refer to 'that last thing', and 'the first thing':
+
+```sh
+fortune -l > file1
+cat !$  | tr -d u
+diff !^ !$
+```
+
+**NB:** this can go wrong:
+
+```sh
+ls -l file1 file2
+cat !^
+```
+
+Done
+----
+
+`<C-d>`
+
+- If you have a command, Control + d will execute the command.
+- If you have nothing, `exit`.
+
+Input Run-Commands (`~/.inputrc`)
+=================================
+
+Alias Expansion
+---------------
+
+```sh
+echo '"\C- ": shell-expand-line' >> ~/.inputrc
+exec bash
+```
+
+Now you can expand all aliases with 'Control + Space'.
+Try just `ls`, then 'Control + Space'.
+
+Glob Expansion (`*`)
+--------------------
+
+```sh
+echo '"\C-x": glob-expand-word' >> ~/.inputrc
+exec bash
+ls *<C-x>
+```
+
+- Are you sure you want to delete that?
+    * `rm -r *<C-x>`
+- Clean up the Downloads folder:
+    * `rm Downloads/*pdf<C-x>`
+
+Arbitrary Commands
+------------------
+
+Use `\n` as a 'newline' character to automatically press `<Return>`.
+
+```sh
+echo 'Control-y: "| lolcat\n"' >> ~/.inputrc
+exec bash
+ls<C-y>
+```
+
+```sh
+Control-l: "\C-u clear -x && ls\n"
+exec bash
+cd /etc/<C-l>
+```
+
+Readline as Vi
+--------------
+
+```sh
+echo 'set editing-mode vi' >> ~/.inputrc
+echo 'set keymap vi-insert' >> ~/.inputrc
+exec bash
+```
+
+The prompt now works according to `vi`-motions.
+This goes much further than the bash-option, `set -o vi` ('set option: `vi`').
+It changes the cursor in the terminal, not just bash.
+
+Try:
+
+- `ls <C-n>`
+- `ls <C-p>`
+- Type some words.
+- `<Esc>0dw$p`
+- <Esc> to normal-mode, and go back with 'b', and forward with 'e'.
+- `4b` to step back four times.
+- `cE`
+- `<Esc>kcw`
+- ls -a<Esc>xxxx
+
+Readline can work with python one you set `PYTHON_BASIC_REPL` to `true`.
+
+
+```sh
+echo 'export PYTHON_BASIC_REPL=true' >> ~/.bashrc
+exec bash
+```
+
+```python
+im<C-n>os<Return>
+os.li<C-n><Return>
+<Esc>kfn
+<C-d>
+```
+
+Fix Globs!
+----------
+
+If you tried the previous commands then they will not work any more, because the `vi`-commands overwrite the other commands.
+Remove them.
+
+```sh
+sed '/ vi/d' ~/.inputrc
+sed -i '/ vi/d' ~/.inputrc
+
+sed '1 i set editing-mode vi' .inputrc 
+sed -i '1 i set editing-mode vi' ~/.inputrc 
+sed -i '2 i set keymap vi-insert' ~/.inputrc 
+```
+
+Vi-sibility
+-----------
+
+The `readline` prompt becomes confusing if you don't remember if you're in insert or normal mode.
+But you can show the  current mode in the prompt:
+
+```sh
+echo 'set show-mode-in-prompt on' >> ~/.inputrc
+exec bash
+```
+
+Set new symbols for normal and insert mode:
+
+```sh
+echo 'set vi-ins-mode-string "  "' >> ~/.inputrc
+echo 'set vi-cmd-mode-string " "' >> ~/.inputrc
+```
+
+Fuzzy Sort
+==========
+
+Check your repos for `sk-im`, and install.
+The program is called `sk`.
+
+```sh
+FUZZY=sk
+```
+
+If you don't have it, `fzy` or `fzf` should work the same way.
+
+```sh
+FUZZY=fzy
+```
+
+Find some 'read-config' files to check out:
+
+```sh
+find . -maxdepth 2 -name "*rc"
+find . -maxdepth 2 -name "*rc" | $FUZZY
+```
+
+And read some:
+
+```sh
+PAGER='less -R'
+$PAGER "$(find . -maxdepth 2 -name "*rc" | $FUZZY)"
+```
+
+Make the change long-term:
+
+```sh
+alias rrc='$PAGER "$(find . -maxdepth 2 -name "*rc" | sk)"'
+alias | grep rrc= >> ~/.bash_aliases
+```

basics/soft_links.md

@@ -0,0 +1,72 @@
+---
+title: "soft links"
+tags: [ "basics", "links" ]
+---
+A soft link is a file which says how to go to another file.
+When a program encounters a soft link, it will make a  guess at whether it should ignore it, or try to get to that file.
+
+To make a soft link to a file in the current directory, linking is easy:
+
+```sh
+fortune > $file_1
+ln -s $file_1 $link_1
+```
+
+Now imagine your directory looks like this:
+
+```
+dir_0/
+├── dir_1
+│   └── file_1
+├── dir_2
+│   └── file_1
+├── file_1
+└── link_1
+
+```
+
+Inside `dir_1`, making a soft link to `dir_0/file_1` would mean putting the directions to that file:
+
+```sh
+cd dir_1
+ln -s ../file_1 link_1
+```
+
+The real content of the file is just '`../file_1`, so making it from another directory would mean writing exactly the same address to that file:
+
+```sh
+ln -s ../file_1 dir_2/link_2
+```
+
+Both symlinks are identical, except for the name.
+
+```
+dir_0/
+├── dir_1
+│   ├── file_1
+│   └── link_1   <-- This one points to ../file_1
+├── dir_2
+│   ├── file_1
+│   └── link_2   <-- This one points to ../file_1 as well.
+└── file_2
+
+```
+
+Since it's just an address, you can delete the original file, then make another.
+
+```sh
+rm file_1
+ls -l dir_1/
+fortune > file_1
+cat dir_2/link_2
+fortune | tee -a file_1
+cat dir_1/link_1
+```
+
+Last, let's make a link from `dir_2/link_2` to `dir_1/file_1` (this will delete the old link):
+
+```sh
+ln -s -f ../dir_1/file_1 dir_2/link_2
+cat dir_2/link_2
+```
+

basics/time.md

@@ -1,12 +1,12 @@
 ---
 title: "time"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics", "time" ]
 ---
 # systemd
 
 Set time to synchronize with an ntp server:
 
-```bash
+```sh
 timedatectl set-ntp true
 ```
 
@@ -18,7 +18,7 @@ Local time is kept in /etc/localtime.
 
 According to Dave's LPIC guide, you can set the local time by making asymboling link from your timezone to /etc/localtime, as so:
 
-```bash
+```sh
 sudo ln -sf /usr/share/zoneinfo/Europe/Belgrade /etc/localtime
 ```
 
@@ -28,43 +28,51 @@ sudo ln -sf /usr/share/zoneinfo/Europe/Belgrade /etc/localtime
 
 See local time, language and character settings with:
 
-```bash
+```sh
 locale
 ```
 
 List available locales with:
 
-```bash
+```sh
 locale -a
 ```
 
 To see additional locales which are available (but not necessarily installed):
 
-```bash
+```sh
 cat /usr/share/i18n/SUPPORTED
 ```
 
 Set a supported locale with:
 
-```bash
+```sh
 locale-gen pl_PL.UTF-8
 ```
 
 Then set that language, with:
 
-```bash
+```sh
 LANG=pl_PL.UTF-8
 ```
 
-... then reboot.
+...then reboot.
 
 # Network Time Protocol
 
 Glimpse an overview with:
 
-```bash
+```sh
 ntpq -p
 ```
 
 Usually this is run as a service, so just start that service.
 
+# Force Reset
+
+If your clock drifts too far from the right time, it will not reset happily.
+For it to reset like this:
+
+```sh
+sudo ntpd -q -g -x -n
+```

basics/tree.md

@@ -0,0 +1,36 @@
+---
+title: "tree"
+tags: [ "basics", "tree", "markdown" ]
+---
+
+The `tree` utility outputs a full listing of everything in your current directory, and those below.
+
+- Just directories: `tree -d`
+- Output colour to `less`: `tree -C --info | less -re`
+- Ignore files in the `.gitignore` file: `tree --gitignore`
+
+You can place information about the files in a directory to use with the `tree --info` option, like this:
+
+```
+config
+	Config files.
+	This is a git submodule.
+README.md
+	Summary of the git.
+*.jpg
+	Little picture, does not display
+	words well.
+```
+
+Each description-line starts with a tab.
+
+## Markdown Conversion
+
+To represent a file structure as a nested series of markdown lists, you can try this horrifying `sed` one-liner:
+
+```sh
+tree -tf --dirsfirst --gitignore --noreport --charset ascii  | \
+    sed -e 's/| \+/  /g' \
+    -e 's/[|`]-\+/ */g' \
+    -e 's:\(* \)\(\(.*/\)\([^/]\+\)\):\1[\4](\2):g'
+```

basics/users.md

@@ -1,28 +1,28 @@
 ---
 title: "users"
-tags: [ "Documentation", "Basics" ]
+tags: [ "basics" ]
 ---
 # Basic Information
 
 Let's get some entries with 'getent', e.g. passwd or group.
 
-```bash
+```sh
 getent passwd
 ```
 
-```bash
+```sh
 getent group
 ```
 
 Obviously:
 
-```bash
+```sh
 getent shadow
 ```
 
 ## Examples
 
-```bash
+```sh
 sudo adduser maestro 
 ```
 
@@ -30,71 +30,71 @@ add user 'maestro'
 
 This depends upon the settings in the /etc/default/useradd file and /etc/login.defs
 
-```bash
+```sh
 sudo useradd -m pinkie 
 ```
 
 add user 'pinkie' with a home directory
 
-```bash
+```sh
 sudo adduser -m -e 2017-04-25 temp 
 ```
 
 add expiry date to user
 
-```bash
+```sh
 userdel maestro 
 ```
 
 delete maestro
 
-```bash
+```sh
 userdel -r maestro 
 ```
 
 delete maestro and hir homefolder
 
-```bash
+```sh
 groups 
 ```
 
 find which group you are in
 
 
-```bash
+```sh
 id 
 ```
 
 same
 
-```bash
+```sh
 id -Gn maestro 
 ```
 
 Find which groups maestro is in
 
 
-```bash
+```sh
 deluser --remove-home maestro 
 ```
 
 delete user maestro
 
 
-```bash
+```sh
 usermod -aG sudo maestro 
 ```
 
 Add user maestro to group sudo:
 
 
-```bash
+```sh
 cat /etc/passwd 
 ```
 
 list users' passwords (and therefore users)
 
-```bash
+```sh
 groupadd awesome 
 ```
 
@@ -104,33 +104,33 @@ Passwords are stored in /etc/shadow.
 
 There are user accounts for processes such as 'bin' and 'nobody' which are locked, so they're unusable.
 
-```bash
+```sh
 passwd -l bin 
 ```
 
 Lock the user 'bin'.
 
-```bash
+```sh
 more /etc/passwd | grep games 
 ```
 
 we find the name, password and user id of the user 'games'. I.e. the password is 'x', and the user id is '5'.  The password is an impossible hash, so no input password could match.
 
-```bash
+```sh
 groupdel learners | delete the group 'learners'
 ```
 
-```bash
+```sh
 gpasswd -d pi games | remove user 'pi' from the group 'games'
 ```
 
-```bash
+```sh
 id games 
 ```
 
 find the id number of group 'games' (60)
 
-```bash
+```sh
 usermod -aG sudo maestro 
 ```
 
@@ -156,7 +156,7 @@ Alternatively, change the shell in /etc/passwd.
 
 Usermod also lets you change a user's username:
 
-```bash
+```sh
 usermod -l henry mark
 ```
 
@@ -170,7 +170,7 @@ usermod -L henry
 
 -G or -groups adds the user to other groups:
 
-```bash
+```sh
 usermod -G sudo henry
 ```
 
@@ -186,13 +186,13 @@ In /etc/group, a group file may look like this:
 
 We can use groupmod, like like usermod, e.g. to change a name:
 
-```bash
+```sh
 groupmod -n frontoffice backoffice
 ```
 
 Delte a group:
 
-```bash
+```sh
 groupdel frontoffice
 ```
 
@@ -200,37 +200,37 @@ groupdel frontoffice
 
 See list of logged on users.
 
-```bash
+```sh
 w
 ```
 
 See last logons:
 
-```bash
+```sh
 last
 ```
 
 or all logon attempts, including bad attempts:
 
-```bash
+```sh
 lastb
 ```
 
 List recently accessed files:
 
-```bash
+```sh
 last -d
 ```
 
 See files opened by steve
 
-```bash
+```sh
 lsof -t -u steve
 ```
 
 See files opened by anyone but steve
 
-```bash
+```sh
 lsof -u ^steve
 ```
 
@@ -240,19 +240,19 @@ Some files can be executed by people as if they had super user permissions, and
 
 Let's start with files executable by user:
 
-```bash
+```sh
 sudo find / -type f -perm -g=s -ls
 ```
 
 And then those executable by the group:
 
-```bash
+```sh
 find / -type f -perm -g=s -ls
 ```
 
 And finally, worrying files, executable by anyone as if sie were the owner:
 
-```bash
+```sh
 find / -xdev \( -o -nogroup \) -print
 ```
 
@@ -260,7 +260,7 @@ Then have a look at resource usage per user.
 
 # SGID
 
-```bash
+```sh
 sudo chmod u+s process.sh
 ```
 

basics/yes.md

@@ -0,0 +1,24 @@
+---
+title: "yes"
+tags: [ "basics" ]
+---
+# The Best Linux Program: `yes`
+
+The program `yes` prints the word `yes` to your terminal until you cancel it, perhaps with 'Control + c'.
+Or technically it prints `yes\n`, meaning `yes` and then a new line (like pressing the Return key).
+
+This is extremely powerful.
+
+If you ever want to automatically install something which persistently nags you with `do you want to do the thing? [y/N]?`, then you can just pipe `yes` into that program, and it will answer 'yes' to all questions.
+
+```sh
+yes | $INSTALL_SCRIPT_FILE.sh
+```
+
+This works best for disposable systems, like VMs or containers.
+Try this on a live system, and you might find out that you should have read that message fully.
+
+```sh
+yes | yay
+```
+

chat/profanity.md

@@ -1,6 +1,6 @@
 ---
 title: "profanity"
-tags: [ "Documentation", "Chat" ]
+tags: [ "chat", "omemo" ]
 ---
 # Setup (Commands)
 
@@ -140,54 +140,5 @@ You can ensure omemo automatcally turns on:
 ```
 /omemo policy automatic
 ```
-
+---
-## otr
-
-Install libotr-dev or libotr5-dev or whatever..
-
-```
-sudo apt -y install lib5otr-dev
-```
-
-Make your otr keys.
-
-```
-/otr gen
-```
-
-Then you can start an otr converstation.
-
-```
-/otr start bob@jobbies.org
-```
-
-Or if you already have a conversation windows open, switch to our using:
-
-```
-/otr
-```
-
-Finally, verify!
-
-```
-/otr question "Who are you?" bob
-```
-
-Bob is verified upon the answer, 'bob'.
-
-### OTR Finger Prints
-
-Get yours with 
-
-```
-/otr myfp
-```
-
-```
-/otr theirfp
-```
-
-```
-/otr myfp
-```
 

chat/wgetpaste.md

@@ -1,29 +1,29 @@
 ---
 title: "wgetpaste"
-tags: [ "Documentation", "Chat" ]
+tags: [ "chat" ]
 ---
 
 See available pastebins:
 
-```bash
+```sh
 wgetpaste -S
 ```
 
 Upload script.sh to bpaste:
 
-```bash
+```sh
 wgetpaste -s bpaste script.sh
 ```
 
 Input clipboard to dpaste with the heading "Title"
 
-```bash
+```sh
 wgetpaste -s dpaste -d Title -x
 ```
 
 Paste in the file then load the result to the right-hand clipboard:
 
-```bash
+```sh
 wgetpaste -s dpaste -X
 ```
 

data/backups/archives.md

@@ -1,6 +1,6 @@
 ---
 title: "Archives"
-tags: [ "Documentation", "tar", "backups" ]
+tags: [ "tar", "backups", ".tgz", "tar.gz" ]
 ---
 # `tar`
 
@@ -8,22 +8,21 @@ tags: [ "Documentation", "tar", "backups" ]
 
 Combine many files and directories into a single t-archive file.
 
-```bash
+```sh
 tar cf "$ARCHIVE".tar $DIR
 ```
 You can remember this with the mnemonic '*C*reate *F*ile'.
 
-Unfortunately, this stores the full file path, so making a tar archive of `/etc/nginx/` will store `etc/nginx` (without the leading `/`.
+Unfortunately, this stores the full file path, so making a tar archive of `/etc/nginx/` will store `etc/nginx` (without the leading `/`).
-
 It's often better to tell tar which path to start from using the `-C` flag.
 
-```bash
+```sh
 tar cf "$ARCHIVE".tar -C /etc/ nginx
 ```
 
 Check the contents of your archive with:
 
-```bash
+```sh
 tar tf "$ARCHIVE".tar
 ```
 
@@ -31,7 +30,7 @@ If you want to store 'everything in a directory', then using `*` will not work,
 
 Instead, you can store the target in a variable:
 
-```bash
+```sh
 files=$(ls /etc/nginx)
 tar cf "$ARCHIVE".tar -C /etc/nginx/ $file
 ```
@@ -40,7 +39,9 @@ tar cf "$ARCHIVE".tar -C /etc/nginx/ $file
 
 Extract the tar archive with
 
-> tar xf "$ARCHIVE".tar
+```sh
+tar xf "$ARCHIVE".tar
+```
 
 You can remember this with the mnemonic 'e*X*tract *F*ile'.
 
@@ -48,7 +49,7 @@ You can remember this with the mnemonic 'e*X*tract *F*ile'.
 
 Create a zip-compressed archive with the `z` flag.
 
-```bash
+```sh
 tar czf "$ARCHIVE".tgz -C /etc/nginx/ $file
 ```
 
@@ -60,18 +61,16 @@ You can use any file ending you want, but sane people like to use '.tgz' or '.ta
 
 Make archive:
 
-```bash
+```sh
-PASSWORD=my_password
+7za a -tzip -p "$PASSWORD" -mem=AES256 $ARCHIVE.zip $FILE_1 $FILE_2
-```
-```bash
-7za a -tzip -p$PASSWORD -mem=AES256 $ARCHIVE.zip $FILE_1 $FILE_2
 ```
+
 Note that people can still see every filename in your archive, and can change those files.
 They just can't read the contents.
 
 Unzip:
 
-```bash
+```sh
 7za x archive.zip
 ```
 

data/backups/unison.md

@@ -1,11 +1,11 @@
 ---
 title: "unison"
-tags: [ "Documentation", "Backups" ]
+tags: [ "backups", "synch" ]
 ---
 
 Install unison on both machines, and make sure both have the same version of unison, with the same version of the ocaml compiler (the smallest difference will cause problems).
 
-```bash
+```sh
 unison -version
 ```
 
@@ -13,14 +13,14 @@ Create the `~/.unison` directory on both machines.
 
 Make a job called `backup`:
 
-```bash
+```sh
 JOB=backup
 ```
 
 Here is an example job, which synchronizes the `~/music` directory with a remote machine which has the same username.
 
 
-```bash
+```sh
 echo "
 auto = true
 root=$HOME
@@ -42,7 +42,7 @@ The last command means it will ignore any file with a name ending in `.flac`.
 The first command means this will run but also confirm which files will be deleted, and which will be transferred, us `batch = true` instead.
 Or you can deleted that line in the `.prf` file and run it with a flag:
 
-```bash
+```sh
 unison -batch *backup*.prf
 ```
 

data/base_16.md

@@ -1,8 +1,26 @@
 ---
 title: "Base 16"
-tags: [ "Documentation", "Data" ]
+tags: [ "data" ]
 ---
 
-```bash
+Base 16 numbers often use `0x` at the start, so '10' just means '10', but `0x10` means '10 in base 16' which means '16'.
+
+For small numbers, use `printf`.
+
+```sh
 printf "%x" $NUMBER
 ```
+
+For any number, use `bc`.
+
+
+```sh
+fortune | md5sum  | cut -d' ' -f1 | tr [:lower:] [:upper:] | bc
+```
+
+- Inputting base 16 uses `ibase=16`.
+- Outputting base 10 uses `ibase=10`
+
+```sh
+echo 'ibase=16;' $(echo cbb478ac825f0dce7671254be035d0bc | tr [:lower:] [:upper:]) | bc
+```

data/calcurse.md

@@ -0,0 +1,14 @@
+---
+title: "calcurse"
+tags: [ "data", "calendar", "daylight savings" ]
+---
+
+## Setup
+
+The UK government keeps an `ics` file with clock.
+
+```sh
+wget https://www.gov.uk/when-do-the-clocks-change/united-kingdom.ics
+calcurse -i united-kingdom.ics
+```
+

data/email.md

@@ -0,0 +1,73 @@
+---
+title: "e-mail"
+tags: [ "data", "smtp" ]
+---
+
+This is bare-bones, original, primitive e-mail.
+
+Install `opensmtpd` (or similar), then `ncat` or `nc` or `netcat` (this mysterious cat has many names).
+
+Start the `opensmtpd` service, then use netcat to speak with the mail-daemon:
+
+```sh
+nc localhost 25
+```
+
+The computer should respond with code `220`, which means 'I am listening'.
+
+> 220 hex ESMTP OpenSMTPD
+
+```
+HELO gmail.com
+```
+
+You say `HELO` and say where you are coming from.
+
+
+The `smtpd` will not check, so I am going to lie to it.
+Mail servers are easily impressed, so it will be pleased to meet you.
+
+> 250 hex Hello gmail.com [::1], pleased to meet you
+
+```
+MAIL FROM: <admin@gmail.com>
+```
+
+All the mail commands start with 4 bytes, because it's easier for admins to program.
+Tell the mail daemon who you are in this format.
+
+> 250 2.0.0 Ok
+
+Then tell it who you're sending to.
+
+```sh
+RCPT TO: <www@dmz.rs>
+```
+
+> 250 2.1.5 Destination address valid: Recipient ok
+
+Finally, tell it that you want to send `DATA`.
+
+```
+DATA
+```
+
+> 354 Enter mail, end with "." on a line by itself
+
+```
+Subject: turn off server please
+
+very urgent
+.
+```
+
+> 250 2.0.0 73864a49 Message accepted for delivery
+
+You will find the email under `/var/spool` or `/var/mail` or similar.
+
+If unsure, just take a part of your email, like `FRAGMENT="turn off server please"`, then `grep` for it:
+
+ ```sh
+sudo grep -r $FRAGMENT /var/spool/*
+ ```
+

data/exiftool.md

@@ -1,17 +1,17 @@
 ---
 title: "exiftool"
-tags: [ "Documentation", "Metadata" ]
+tags: [ "metadata", "exifdata" ]
 ---
 
-Find metadata.
+Find metadata:
 
-```bash
+```sh
-exiftool image.jpg
+exiftool "$file".jpg
 ```
 
-Find info on all images in current directory.
+Find info on all `.png` images in current directory.
 
-```bash
+```sh
 exiftool -ext .png .
 ```
 
@@ -19,20 +19,14 @@ You can make this recurring with the -r switch.
 
 And overwrite all metadata:
 
-```bash
+```sh
 exiftool -all= -overwrite_original -ext jpg .
 ```
+(NB: This does not work on pdf data. See [here](pdf_erasure.md) for erasing all pdf data)
 
 Or just GPS data:
 
-```bash
+```sh
 exiftool -gps:all= *.jpg
 ```
 
-You can also use the imagemagick tool:
-
-```bash
-identify -verbose
-```
-
-

data/git-lfs.md

@@ -1,24 +0,0 @@
----
-title: "git-lfs"
-tags: [ "Documentation", "data" ]
----
-
-Install, and add with
-
-```bash
-git lfs install
-```
-
-Then track some filetype with:
-
-```bash
-git lfs track "\*.ttf"
-```
-
-Or a directory with:
-
-```bash
-git lfs track "images/"
-```
-
-All changes require adding `.gitattributes`.

data/git/basics.md

@@ -1,46 +1,45 @@
 ---
 title: "git"
-tags: [ "Documentation", "data" ]
+tags: [ "data" ]
 ---
 # Starting
 
 ## New Machines
 
-```bash
+```sh
 git config --global user.email "$YOUR_EMAIL"
 ```
 
-```bash
+```sh
 git config --global user.name "$YOUR_NAME"
 ```
 
 # New Git
 
-Start a git in directory `$DIR`:
+Decide on algorithm:
 
-```bash
+- If you're scared of insecure hash-sums, go with `hash=sha256`.
-mkdir $DIR && cd $DIR
+- If you don't know what a hash sum is, go with `hash=sha1`.
+
+## Init the Git
+
+Start a git in directory `${DIR}`:
+
+```sh
+git init --object-format=${hash} ${DIR}
+cd ${DIR}
 ```
 
-```bash
+Make a file explaining what the project does, and tell `git` to track it:
-git init
-```
 
-Make a file explaining what the project does:
+```sh
-
+echo "I hereby solemnly swear never to commit a binary file." > README.md
-```bash
-vim README.md
-```
-
-Add this to the git:
-
-```bash
 git add README.md
 ```
 
 Then make the initial commit, explaining the change you just made:
 
-```bash
+```sh
 git commit
 ```
 
@@ -48,17 +47,17 @@ git commit
 
 Once you make a change to some file, add it and make a commit explaining it.
 
-```bash
+```sh
 git add $FILE
 ```
 
-```bash
+```sh
 git commit -m"change $FILE"
 ```
 
 Check your history:
 
-```bash
+```sh
 git log
 ```
 
@@ -69,20 +68,20 @@ Give it the same name as the `$DIR` directory, above.
 
 Add this as a remote:
 
-```bash
+```sh
 REMOTE=gitlab
 git remote add $REMOTE  https://gitlab.com/$USERNAME/$DIR
 ```
 
 Tell git you're pushing the branch "master" to the remote repo "origin": 
 
-```bash
+```sh
 git push -u master origin
 ```
 
 If someone makes a change on the remote, pull it down with:
 
-```bash
+```sh
 git pull
 ```
 
@@ -91,109 +90,82 @@ git pull
 A branch is a full copy of the project to test additional ideas.
 You can make a new branch called 'featurez' like this:
 
-```bash
+```sh
-git branch *featurez*
+git branch $FEATURE_BRANCH
 ```
 
 Have a look at all your branches:
 
-```bash
+```sh
 git branch
 ```
 
 Switch to your new branch:
 
-```bash
+```sh
-git checkout *featurez*
+git checkout $FEATURE_BRANCH
 ```
 
 And if your changes are rubbish, checkout the "master" branch again, then delete "featurez":
 
-```bash
+```sh
-git branch -D *featurez*
+git branch -D $FEATURE_BRANCH
 ```
 
 Or if it's a good branch, push it to the remote:
 
-```bash
+```sh
-git push *origin* *featurez*
+remote=origin
+git push $remote $FEATURE_BRANCH
 ```
 
 ## Merging
 
 Once you like the feature, merge it into the main branch.  Switch to master then merge it:
 
-```bash
+```sh
-git merge *featurez*
+git merge $FEATURE_BRANCH
 ```
 
-and delete `featurez` as you've already merged it:
+And delete the branch, as you've already merged it:
 
-```bash
+```sh
-git branch -d featurez
+git branch -d $FEATURE_BRANCH
 ```
 
 # Subtree
 
 ## Pulling another git repo into a subtree
 
-```bash
+```sh
 git subtree add -P config git@gitlab.com:bindrpg/config.git master
 ```
 
-## Pulling a Subtree from an existing git
-
-The project has subdirectories sub-1,sub-2,sub-3.  The first should be its own repository, but should also retain its own history.
-
-First, we extract its history as an independent item, and make that into a seprate branch.
-
-```bash
-git subtree split --prefix=sub-1 -b sub
-```
-
-If you want something a few directories deep, you can use `--prefix=sub-1/dir-2/dir-3
-
-Then go and create a new git somewhere else:
-
-```bash
-cd ..;mkdir sub-1;cd sub-1;git init --bare
-```
-
-Then go back to your initial git repo, and do the following:
-
-git push ../subtest sub:master
-
-Finally, you can clone this repo from your original.
-
-```bash
-git clone ../subtest
-```
-
 # Tricks
 
 ## Delete All History
 
-```bash
+```sh
 git checkout --orphan temp
 ```
 
-```bash
+```sh
 git add -A
 ```
 
-```bash
+```sh
 git commit -am "release the commits!"
 ```
 
-```bash
+```sh
 git branch -D master
 ```
 
-```bash
+```sh
 git branch -m master
 ```
 
-```bash
+```sh
 git push -f origin master
 ```
 
@@ -201,21 +173,21 @@ Gitlab requires more changes, such as going to `settings > repository` and switc
 
 ## Clean up Bloated Repo
 
-```bash
+```sh
 git fsck --full
 ```
 
-```bash
+```sh
 git gc --prune=now --aggressive
 ```
 
-```bash
+```sh
 git repack
 ```
 
 ## Find Binary Blobs
 
-```bash
+```sh
 git rev-list --objects --all \
 | git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' \
 | sed -n 's/^blob //p' \

data/git/commit_for_another.md

@@ -0,0 +1,22 @@
+---
+title: "Commit for Another"
+tags: [ "data", "git" ]
+---
+
+You can make Alice the author, while you are still the commiter:
+
+```sh
+name="Alice Bobinson"
+email="alice@email.com"
+
+git add ${file}
+git commit --author="${name} <${email}>"
+```
+
+Or, make Alice both the committer and the author:
+
+
+```sh
+git -c user.name="${name}" -c user.email="${email}" commit -m "${message}"
+```
+

data/git/git-lfs.md

@@ -0,0 +1,73 @@
+---
+title: "git-lfs"
+tags: [ "data", "git" ]
+requires: [ "git" ]
+---
+
+Git Large File Storage ('LFS') needs to change your `~/.gitconfig` to check out those binary files:
+
+```sh
+cat ~/.gitconfig
+git lfs install
+cat ~/.gitconfig
+```
+
+Then track some filetypes with:
+
+```sh
+cd $git_repository
+ext=ttf
+git lfs track "*.$ext"
+```
+
+Or a directory with:
+
+```sh
+git lfs track "images/"
+```
+
+Track the changes to `.gitattributes`:
+
+```sh
+git status
+git add .gitattributes
+git commit -m "add $ext to lfs"
+```
+
+## Bash Completion
+
+If bash completion does not work, you'll have to add it:
+
+```sh
+git lfs completion bash |  sudo tee /usr/share/bash-completion/completions/git-lfs 
+```
+
+## Trouble Shooting
+
+You have some file "$FILE".png, which has some problem.
+
+Check the filetype:
+
+```sh
+file "$FILE".png
+```
+
+This should say the type is 'image'.
+If it says the type is 'text', then this file is really just a reminder to `git-lfs` to check out that file.
+
+Check `git-lfs` is expecting that file:
+
+```sh
+git lfs status
+git lfs ls-files
+```
+
+...then try these commands, and check the filetype again:
+
+```sh
+git lfs fetch --all
+git lfs fsck
+git lfs checkout
+git lfs status
+```
+

data/git/git_secret.md

@@ -0,0 +1,9 @@
+---
+title: "git-secret"
+tags: [ "data", "git" ]
+---
+
+This utility is largely useless, as it can only identify people by their email.
+So if someone has multiple GPG keys associated with one email, the tool will not work.
+
+A broken tool is better than a tool which will break soon.

data/git/git_stash.md

@@ -0,0 +1,69 @@
+---
+title: "git stash"
+tags: [ "data", "git" ]
+requires: [ "git" ]
+---
+
+Save file-changes without committing anything.
+
+Change a file:
+
+```sh
+file=README.md
+fortune >> ${file}
+git diff
+git stash save
+```
+
+List which stashes you have:
+
+
+```sh
+git stash list
+
+    stash@{1}: WIP on master: c21f102 init git
+```
+
+Make a new file, then stash it:
+
+
+```sh
+otherfile=file.log
+fortune > ${otherfile}
+git add ${otherfile}
+stashname=logfile
+git stash save ${stashname}
+```
+
+Now you can see two stashed changes, and the most recent has a name:
+
+```sh
+git stash list
+
+    stash@{0}: On master: logfile
+    stash@{1}: WIP on master: c21f102 init git
+```
+
+You can delete a stash by referring to its index number, or name (if it has one).
+
+```sh
+choice=1
+git stash drop ${choice}
+
+choice=${stashname}
+git stash drop ${choice}
+```
+
+Or just run `git stash drop` to remove the most recent (labelled `{0}`).
+
+Return stashed changes with an index number (or the most recent).
+
+```sh
+git stash pop ${choice}
+```
+
+Delete all stashes:
+
+```sh
+git stash clear
+```

data/git/hooks.md

@@ -0,0 +1,29 @@
+---
+title: "git hooks"
+tags: [ "data", "git" ]
+---
+
+Check out the sample hooks:
+
+```sh
+cd $GIT_REPO
+ls .git/hooks
+head .git/hooks/pre-commit.sample
+```
+
+Add a hook to check the shell scripts in `$GIT_REPO` before making a commit:
+
+```sh
+echo '#!/bin/sh
+shellcheck *.sh' > .git/hooks/commit-msg
+chmod u+x .git/hooks/commit-msg
+```
+
+## Committing
+
+Your `git hooks` will not enter the repository, but you can commit them to a repository, then request others add these git hooks to their own branch, by putting a note in the project's `README.md`.
+
+```markdown
+The project comes with recommended git hooks.
+You can activate the hooks with `git config core.hooksPath hooks`.
+```

data/git/subtree.md

@@ -0,0 +1,34 @@
+---
+title: "git subtree"
+tags: [ "data", "git", "subtree" ]
+---
+
+## Pulling a Subtree from an existing git
+
+The project has subdirectories `sub-1`, `sub-2`, `sub-3`.
+The first should be its own repository, but should also retain its own history.
+
+First, we extract its history as an independent item, and make that into a seprate branch.
+
+```sh
+git subtree split --prefix=sub-1 -b sub
+```
+
+If you want something a few directories deep, you can use `--prefix=sub-1/dir-2/dir-3
+
+Then go and create a new git somewhere else:
+
+```sh
+cd ..;mkdir sub-1;cd sub-1;git init --bare
+```
+
+Then go back to your initial git repo, and do the following:
+
+git push ../subtest sub:master
+
+Finally, you can clone this repo from your original.
+
+```sh
+git clone ../subtest
+```
+

data/gpg.md

@@ -1,119 +1,7 @@
 ---
 title: "gpg"
-tags: [ "Documentation", "data" ]
+tags: [ "data", "gpg" ]
 ---
-# Making keys
-
-Generate keys:
-
-```bash
-gpg --gen-key
-```
-
-Follow the guide.
-
-# Encrypting a file
-
-```bash
-gpg -r malinfreeborn@posteo.net -e file
-```
-
-`-r` specifies the recipient.
-
-Check you have an encrypted version of your file.
-
-# Changing Expiration Dates
-
-gpg --list-keys
-
-... and then use the second part of 'pub', which is the ID.  But that's not appearing here so... on with gpg2?
-
-# Making encrypted files with a local password
-
-Make a password with a password (cypher encryption).
-
-```bash
-gpg -c --output passwords.txt
-```
-
-or 
-
-```bash
-gpg -c > passwords.txt
-```
-
-Put in a password.
-
-Write message then stop with Ctrl+d.
-
-Get the message back out the file with:
-
-```bash
-gpg -d passwords.txt
-```
-
-# Circles of Trust
-
-Search for a key at any key store:
-
-```bash
-gpg --search-keys nestorv
-```
-
-Once you've made a decision about someone:
-
-```bash
-gpg --list-keys
-```
-
-You get something like this:
-
-```
-pub   rsa3072 2021-08-15 [SC] [expires: 2023-08-15]
-      CD30421FD825696BD95F1FF644C62C57B790D3CF
-uid           [ultimate] Malin Freeborn <malinfreeborn@posteo.net>
-sub   rsa3072 2021-08-15 [E] [expires: 2023-08-15]
-
-```
-
-Notice the long, ugly, string - CD30421FD825696BD95F1FF644C62C57B790D3CF - and how horribly ugly it is.
-This is a fingerprint.
-
-You can now decide the trust level (this stays on your computer).
-
-```bash
-gpg --edit-key *CD30421FD825696BD95F1FF644C62C57B790D3CF*
-```
-
-Once you're in the interface, type `trust`.
-
-```bash
-gpg --sign-key alice@posteo.net
-```
-
-Then send those trusted keys up to a server, so people can see you have verified them:
-
-```bash
-gpg --send-keys *024C6B1C84449BD1CB4DF7A152295D2377F4D70F*
-```
-
-# Refresh Keys
-
-```bash
-gpg --refresh-keys
-```
-
-# Export
-
-Your public key:
-
-```bash
-gpg --output *me*.gpg --armor --export
-```
-
-or
-
-```bash
-gpg --export -a *person@email.tld* > *my_key*.pub
-```
 
+- [Setup](gpg/basics.md)
+- [Extras](gpg/extras.md)

data/gpg/basics.md

@@ -0,0 +1,146 @@
+---
+title: "GPG Basics"
+tags: [ "data", "GPG" ]
+---
+# Making keys
+
+Generate keys:
+
+```sh
+gpg --full-generate-key
+```
+
+Follow the guide.
+
+# Encrypting a file
+
+```sh
+gpg -r malinfreeborn@posteo.net -e file
+```
+
+`-r` specifies the recipient.
+
+Check you have an encrypted version of your file.
+
+# Changing Expiration Dates
+
+
+```sh
+gpg --list-keys
+# or...
+gpg -k
+```
+
+... and then use the second part of 'pub', which is the ID.  But that's not appearing here so... on with gpg2?
+
+# Making encrypted files with a local password
+
+Make a password with a password (cypher encryption).
+
+```sh
+gpg -c --output passwords.txt
+```
+
+or 
+
+```sh
+gpg -c > passwords.txt
+```
+
+Put in a password.
+
+Write message then stop with Ctrl+d.
+
+Get the message back out the file with:
+
+```sh
+gpg -d passwords.txt
+```
+
+# Circles of Trust
+
+Search for a key at any key store:
+
+```sh
+gpg --search-keys nestorv
+```
+
+Once you've made a decision about someone:
+
+```sh
+gpg --list-keys
+```
+
+You get something like this:
+
+```
+pub   rsa3072 2021-08-15 [SC] [expires: 2023-08-15]
+      CD30421FD825696BD95F1FF644C62C57B790D3CF
+uid           [ultimate] Malin Freeborn <malinfreeborn@posteo.net>
+sub   rsa3072 2021-08-15 [E] [expires: after-forever]
+
+```
+
+Notice the long, ugly, string - `CD30421FD825696BD95F1FF644C62C57B790D3CF` - and how horribly ugly it is.
+This is a fingerprint.
+
+You can now decide the trust level (this stays on your computer).
+
+```sh
+gpg --edit-key CD30421FD825696BD95F1FF644C62C57B790D3CF
+```
+
+Once you're in the interface, type `trust`.
+
+```sh
+gpg --sign-key alice@posteo.net
+```
+
+# Swapping Keys
+
+This system relies on a ring of people swapping key information.
+
+## Sending
+
+Send those trusted keys up to a server, so people can see you have verified them:
+
+```sh
+gpg --send-keys 024C6B1C84449BD1CB4DF7A152295D2377F4D70F
+```
+
+## Upload Your Keys
+
+## Add More Key Servers
+
+Key servers often swap keys, but it's best to just send to multiple places immediately.
+You can add key servers by adding this to `~/.gnupg/gpg.conf`.
+
+```
+keyserver hkps://keys.openpgp.org
+keyserver hkps://mail-api.proton.me
+keyserver hkps://keys.mailvelope.com
+```
+
+# Refresh Keys
+
+Refreshing keys will tell you if some key you have contains a signature from someone you already trust, or if someone has published a revocation certificate (meaning their key should not be trusted any more).
+
+```sh
+gpg --refresh-keys
+```
+
+You can use the [crontab](../../basics/cron.md) to refresh keys, but this will mostly fail, since keyservers often don't hold the right data.
+
+# Export
+
+Your public key:
+
+```sh
+gpg --output me.gpg --armor --export
+```
+Alternatively:
+
+```sh
+gpg --export -a person@email.tld > my_key.pub
+```
+

data/gpg/extras.md

@@ -0,0 +1,11 @@
+---
+title: "gpg with vim"
+tags: [ "vim", "data", "GPG" ]
+requires: [ "GPG Basics", "vim basics" ]
+---
+
+The `vim-gnupg` plugin lets vim edit gpg-encrypted files as if they were unencrypted.
+
+It's probably in your package manager.
+If not, you'll need to endure the faff of following the [instructions](http://www.vim.org/scripts/script.php?script_id=3645).
+

data/groff.md

@@ -1,6 +1,6 @@
 ---
 title: "groff"
-tags: [ "Documentation", "Data" ]
+tags: [ "data", "logic" ]
 ---
 # Basic Documents
 

data/interactive_string_substitution.md

@@ -0,0 +1,19 @@
+---
+title: "Interactive String Substitution"
+tags: [ "data", "vim", "substitution" ]
+---
+
+Want to find and replace, but also confirm each instance?
+
+```sh
+vim -c "%s/${pattern}/${replacement}/gc" -c 'wq' ${file}
+```
+
+Notice that double-quotes (`"`) in the first command (`-c`).
+
+Alternatively, check with an example string:
+
+
+```sh
+sed "s/${pattern}/ARGLEBARGLE/g" ${file} | grep 'ARGLEBARGLE'
+```

data/json.md

@@ -0,0 +1,13 @@
+---
+title: "ijq"
+tags: [ "data", "json", "TUI" ]
+---
+
+Analyse `json` easier with `ijq`.
+
+```sh
+column -J -ts: -H PW,GID,shell -N User,PW,UID,GID,Description,Home,shell /etc/passwd > host.json
+ijq !$
+```
+
+If you get stuck, try adding `.[]`.

data/khard.md

@@ -1,60 +1,52 @@
 ---
 title: "khard"
-tags: [ "Documentation", "Data" ]
+tags: [ "data" ]
 ---
 Get the basic config:
 
-```bash
+```sh
 mkdir ~/.config/khard
 ```
 
-```bash
+```sh
 cp /usr/share/doc/khard/examples/khard/khard.conf.example ~/.config/khard.conf
 ```
 
 Short list
 
-```bash
+```sh
 khard list
 ```
 
 Longer list
 
-```bash
+```sh
 khard show
 ```
 
 Show from addressbook 'work'
 
-```bash
+```sh
 khard list -a work
 ```
 
 Make a new contact in address book 'family'
 
-```bash
+```sh
 khard new -a family
 ```
 
-```bash
+```sh
 khard edit grampa
 ```
 
-```bash
+```sh
 khard remove bob
 ```
 
 Move contact 'nina' from 'work' to 'home' address book.
 
-```bash
+```sh
 khard move -a home nina -A work
 ```
 
-## Advanced
-
-Merge:
-
-```bash
-khard merge [-a source_abook] [-u uid|search terms [search terms ...]] [-A target_abook] [-U target_uid|-t target_search_terms]
-```
-

data/newsboat.md

@@ -1,14 +1,14 @@
 ---
 title: "newsboat"
-tags: [ "Documentation", "RSS" ]
+tags: [ "RSS" ]
 ---
 Create the configuration directory before you start, and add at least 1 URL.
 
-```bash
+```sh
 mkdir ~/.config/newsboat
 ```
 
-```bash
+```sh
 echo 'https://voidlinux.org/atom.xml foss tech' >> ~/.config/newsboat/urls
 ```
 
@@ -28,7 +28,7 @@ You can input a Youtube channel by adding this, with the channel's ID at the end
 
 To get the channel ID without hunting:
 
-```bash
+```sh
 curl *'https://www.youtube.com/@1minfilms'* | grep -oE 'browseId":"U\w+"' | tail | cut -d'"' -f3 
 ```
 

data/newsraft.md

@@ -0,0 +1,54 @@
+---
+title: "Newsraft"
+tags: [ "data", "RSS" ]
+requires: [ "Shell Scripts" ]
+---
+
+# Setup
+
+Install newsraft, then:
+
+```sh
+mkdir ~/.config/newsraft
+echo 'https://codeberg.org/newsraft/newsraft.atom "Newsraft git"' >> ~/.config/newsraft/feeds
+newsraft
+```
+
+# Commands
+
+Copy the default config file:
+
+```
+cp /usr/share/doc/newsraft/example/config ~/.config/newsraft/config
+
+```
+
+Add a line to check the man page while inside the program:
+
+```
+bind M exec man newsraft
+```
+
+This will fail, because the letter 'M' is taken by `mpv`.
+
+Add this line to take the default link, and place it in a list of videos.
+
+```
+bind V mark-read; exec echo "%l" >> ~/.cache/vidlist.txt
+```
+
+# Videos
+
+You can get an RSS feed from any YouTube video with this script:
+
+```
+#!/bin/sh
+
+CHANNEL_ID="$(curl -s "$1" | tr ',' '\n'  | grep -Po 'channelId":"\K[\w+-]+' | tail -1)"
+FEED_URL="https://www.youtube.com/feeds/videos.xml?channel_id=$CHANNEL_ID"
+CHANNEL_NAME="$(curl -s "$FEED_URL" | grep -m 1 -Po 'title\>\K[\w\s]+')"
+
+printf '%s "%s"\n' "$FEED_URL" "$CHANNEL_NAME"
+```
+
+

data/pass.md

@@ -1,42 +1,42 @@
 ---
 title: "pass"
-tags: [ "Documentation", "data" ]
+tags: [ "data" ]
+requires: "GPG Basics"
 ---
-[Video instructions](https://www.hooktube.com/watch?v=hlRQTj1D9LA)
 
 Setup [gpg](./gpg.md) keys.
 
 Show your gpg secret it:
 
-```bash
+```sh
 gpg --list-secret-keys
 ```
 
 Then use the id number under `sec` to make a pass repo:
 
-```bash
+```sh
 KEY="$(gpg --list-secret-keys  | grep -m 1 -A1 '^sec' | tail -n 1)"
 ```
 
-```bash
+```sh
 pass init $KEY
 ```
 
 To add a basic password, e.g. for `$WEBSITE`:
 
-```bash
+```sh
 pass $WEBSITE
 ```
 
 To insert a multiline password, e.g. with a login name:
 
-```bash
+```sh
 pass add -m $WEBSITE
 ```
 
 Remove a password:
 
-```bash
+```sh
 pass rm $WEBSITE
 ```
 

data/pdf-to-txt.md

@@ -1,8 +1,9 @@
 ---
 title: "pdf to txt"
-tags: [ "Documentation", "data", "pdf", "ocr" ]
+tags: [ "data", "pdf", "ocr" ]
 ---
-How to translate pdf book images to text (results are very poor, and will need lots of corrections).
+
+How to translate pdfs to text (results are very poor, and will need lots of corrections).
 
 ## Dependencies
 
@@ -12,13 +13,13 @@ Arch: tesseract-data-eng and poppler-utils
 
 ## Script
 
-```bash
+```sh
 pdftoppm -png *file*.pdf test
 ```
 
-```bash
+```sh
-for x in \*png; do
+for x in *png; do
-    tesseract -l eng  "$x" - >> *out*.txt
+    tesseract -l eng  "$x" - >> out.txt
 done
 ```
 

data/pdf_erasure.md

@@ -0,0 +1,28 @@
+---
+title: "PDF Metadata Erasure"
+tags: [ "metadata", "ghost script", "gs", ".pdf" ]
+---
+
+You cannot erase pdf metadata with `exiftool` (it only *appends* your changes).
+To delete pdf metadata, you'll need `gs`.
+
+Make a text file called 'pdfmark.txt'.
+
+
+```text
+[ /Title ()
+/Author ()
+/Subject ()
+/Creator ()
+/ModDate ()
+/Producer ()
+/Keywords ()
+/CreationDate ()
+/DOCINFO pdfmark
+```
+
+Then run:
+
+```sh
+gs -o output.pdf -sDEVICE=pdfwrite "$FILE".pdf pdfmark.txt
+```

data/radicale.md

@@ -0,0 +1,123 @@
+---
+title: "radicale and nginx"
+tags: [ "data", "calendar" ]
+requires: [ "nginx", "certbot" ]
+---
+
+Check before you start:
+
+- you have a normally running site on nginx already.
+- your server has the directory `/etc/nginx/sites-enabled/` enabled in the nginx config.
+
+## Installation and Service
+
+Install `radicale` through your package manager (not `pip`).
+The standard `radicale` package should come with a nice `systemd` service file.
+
+If the service comes already-started, stop it immediately:
+
+```sh
+sudo systemctl stop radicale
+```
+
+## Set up Passwords
+
+Edit `/etc/radicale/config`, changing the `[auth]` section from this:
+
+```
+#type = none
+```
+
+...to this:
+```
+type = htpasswd
+```
+
+Make sure the service is off, as people may be able to sign in without a password at this point.
+
+Next, find the `htpasswd` program.
+You might get it in the `apache` package or similar.
+
+`htpasswd` allows you to generate passwords for users, and place them in `/etc/radicale/users`.
+
+```sh
+PASS="$(xkcdpass)"
+htpasswd -nb $USER "$PASS" | sudo tee -a /etc/radicale/users
+echo "Your username is $USER"
+echo "Your password is $PASS"
+```
+Right now, you can't sign into the server except through the localhost, which is pointless.
+So now we add a subdomain to `nginx`.
+
+```nginx
+
+echo '
+ server {
+    if ($host = cal.DOMAIN) {
+        return 301 https://$host$request_uri;
+    } # managed by Certbot
+
+
+     listen 80;
+     server_name cal.DOMAIN;
+                                                                                        
+     location / {
+         proxy_pass http://localhost:5232;
+         proxy_set_header Host $host;
+         proxy_set_header X-Real-IP $remote_addr;
+         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+     }
+                                                                                        
+     return 301 https://$server_name$request_uri;
+ 
+
+}
+                                                                                        
+ server {
+     listen 443 ssl;
+     server_name cal.DOMAIN;
+    ssl_certificate /etc/letsencrypt/live/cal.DOMAIN/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/cal.DOMAIN/privkey.pem; # managed by Certbot
+                                                                                        
+     location / {
+         proxy_pass http://localhost:5232;
+         proxy_set_header Host $host;
+         proxy_set_header X-Real-IP $remote_addr;
+         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+     }
+ 
+}
+' > /etc/nginx/sites-available/radicale
+sudo ln -s /etc/nginx/sites-available/radicale /etc/nginx/sites-enables/
+```
+
+Finally, replace the example `DOMAIN` with your actual domain name.
+
+```sh
+DOMAIN=whatever.com
+sudo sed -i "s/DOMAIN/$DOMAIN/g" /etc/nginx/sites-available/radicale 
+```
+
+(optional: replace that `cal.` prefix with anything else)
+
+Check nginx is happy:
+
+```sh
+sudo nginx -t
+```
+You will almost certainly need a new SSL certificate for the site:
+
+```sh
+sudo certbod -d cal.$DOMAIN
+```
+
+Start or restart both services:
+
+```sh
+sudo systemctl start radicale
+sudo systemctl restart nginx
+```
+
+You should now be able to log into your calendar, and add it to a phone.
+
+**NB:** you don't need the port number.

data/recfiles.md

@@ -0,0 +1,54 @@
+---
+title: "Recfiles"
+tags: [ "data", "database" ]
+---
+
+Create:
+
+```sh
+database=games.rec
+touch $database
+for g in Vojvodina Saboter Carcassonne Chess; do
+    recins -r "Name: $g" -r "Played: yes" $database
+done
+```
+
+Read:
+
+```sh
+recsel $database
+query=Carc
+recsel --quick=$query $database
+
+game=Vojvodina
+recsel --expression="Name = '${game}'" $database
+```
+
+Update:
+
+```sh
+recset --expression="Name = '${game}'" -f Played --set="no" $database
+new_field=Played
+value=no
+recset -f "$new_field" --delete $database
+recset -f "$new_field" --set-add="$value" $database
+recsel $database
+```
+
+Delete:
+
+```sh
+recdel --expression="Name = '${game}'" $database
+recset -f "$new_field" --delete $database
+```
+
+- [Extended example](recfiles/extended.md)
+- [Playing with board games data](recfiles/Board_Games.md)
+- [Playing with IP addresses](recfiles/IP_ASN.md)
+- [Manage LaTeX Bibliographies](recfiles/bibliography.md)
+- [Fixes](recfiles/recfixes.md)
+
+# Resources
+
+- [Recfiles for gemini capsules](gemini://tilde.town/~dozens/gemlog/21.gmi)
+

data/recfiles/bibliography.md

@@ -0,0 +1,121 @@
+---
+title: "Recfile Bibliography for TeX"
+tags: [ "data", "database", "recfiles", "tex" ]
+requires: [ "Recfiles", "TeX", "Makefile" ]
+---
+
+Store your bibliography in a `recfile` database, then extract any part with `make`.
+
+For example, you could store books like this in `bibliography.rec`:
+
+```recfile
+%rec: book
+%key: slug
+
+slug: thinkingexperience
+author: H. H. Price
+title: Thinking and Experience
+year: 1953
+publisher: Harvard University Press, Cambridge
+
+slug: inventingrightwrong
+author: John Leslie Mackie
+title: Inventing Right and Wrong
+year: 1997
+publisher: Penguin Books, England
+
+```
+
+Run `make book` to extract `book.bib`, ready for LaTeX to use:
+
+```bib
+@book{thinkingexperience,
+   author = {H. H. Price},
+   title = {Thinking and Experience},
+   year = {1953},
+   publisher = {Harvard University Press, Cambridge},
+}
+
+@book{inventingrightwrong,
+   author = {John Leslie Mackie},
+   title = {Inventing Right and Wrong},
+   year = {1997},
+   publisher = {Penguin Books, England},
+}
+```
+
+The `makefile` syntax is just a few lines (though admittedly employs some garbled shell-crud):
+
+```make
+bibs != grep -Po '%rec: \K.*' bibliography.rec
+bibfiles = $(patsubst %, %.bib, $(bibs))
+
+$(bibfiles): %.bib: bibliography.rec
+	recsel $< -t $(basename $@) |\
+		sed 's/slug: \(.*\)/@$(basename $@){\1,/g' |\
+		sed 's/^\(\b.*\b\): \(.*\)/   \1 = {\2},/gI' |\
+		sed 's/^$$/}\n/g' > $@
+		echo '}' >> $@
+```
+
+Here's a longer `bibliography.rec` file, which can also produce `article.bib`:
+
+```recfile
+%rec: book
+%key: slug
+%type: year int
+%constraint: year > -2000
+%sort: year month
+
+slug: thinkingexperience
+author: H. H. Price
+title: Thinking and Experience
+year: 1953
+publisher: Harvard University Press, Cambridge
+
+slug: inventingrightwrong
+author: John Leslie Mackie
+title: Inventing Right and Wrong
+year: 1997
+publisher: Penguin Books, England
+
+slug: metaphysicscontemporaryintro
+author: Michael J. Loux
+title: Metaphysics: A Contemporary Introduction
+year: 1998
+publisher: Routledge, London
+
+slug: pluralityworlds
+author: David Lewis
+title: On the Plurality of Worlds
+publisher: Blackwell Publishing, Oxford
+year: 2001
+
+%rec: article
+%key: slug
+%sort: year month
+
+slug: genuinerealisttheory
+author: John Divers
+title: A Genuine Realist Theory of Advanced Modalizing
+year: 1999
+pages: 217–240
+month: april
+journaltitle: Mind
+uri: https://academic.oup.com/mind/article-abstract/108/430/217/975258?redirectedFrom=fulltext
+volume: 108
+publisher: Harvard University Press, Cambridge
+
+slug: twokindsmentalrealism
+author: Tam\'{a}s Demeter
+title: Two Kinds of Mental Realism
+year: 2009
+pages: 40:59-71
+uri: https://www.researchgate.net/profile/Tamas_Demeter2/publication/41554923_Two_Kinds_of_Mental_Realism/links/0deec53247f5a4ae21000000.pdf
+month: august
+journaltitle: Journal for General Philosophy of Science
+volume: 30
+publisher: Harvard University Press, Cambridge
+
+```
+

data/recfiles/board_games.md

@@ -0,0 +1,62 @@
+---
+title: "Board Games with Recfiles"
+tags: [ "data", "recfiles", "games" ]
+requires: "Recfiles"
+---
+
+You can play with a board games database from boardgamegeek.com.
+
+## Download the Database
+
+```sh
+mkdir board_games
+cd board_games
+curl -Lo bg.zip 'https://www.kaggle.com/api/v1/datasets/download/threnjen/board-games-database-from-boardgamegeek'
+unzip bg.zip
+```
+
+The header line shows fields with a bunch of colons, which will confused `recutils`, so we'll have to get rid of them.
+
+```sh
+sed -i '1s/://g' *.csv 
+```
+
+Convert the games to `.rec` format.
+
+```sh
+csv2rec games.csv > games.rec
+```
+
+## Queries
+
+If you try to look at older games, you'll find lots of results.
+
+```sh
+recsel games.rec -e "YearPublished < 1800" -c
+recsel games.rec -e "YearPublished < 1800" -Cp Name
+```
+But most are wrong.
+The problem is games with a `YearPublished` date of `0`, probably because the year published is unknown.
+
+```sh
+recsel games.rec -e "Name = 'The Goblin King is Angry'" -p YearPublished
+```
+
+Fix the query by removing games published in '0 AD'.
+
+```sh
+recsel games.rec -e "YearPublished < 1800 && YearPublished != 0" -R YearPublished,Name
+```
+
+Or fix the database setting `YearPublished` to 'unknown':
+
+```sh
+recsel games.rec -e "YearPublished = 0" -Cp Name
+recset games.rec -e "YearPublished = 0" -f "YearPublished" -S 'unknown'
+```
+
+Strategic games which work best with 3 players, sorted by Average Rating:
+
+```sh
+recsel games.rec -e "BestPlayers = 3 && CatStrategy = 1" -CR Name --sort=AvgRating
+```

data/recfiles/extended.md

@@ -0,0 +1,118 @@
+---
+title: "Recfiles Extended Example"
+tags: [ "data", "database", "recfiles" ]
+---
+
+## Create
+
+Make a database for your boardgames, specifying only one field and value:
+
+```sh
+database=games.rec
+n=Name
+g=Vojvodina
+touch $database
+recins -f $n --value $g $database
+recsel $database
+```
+
+Insert a few more, with the estimated playtime:
+
+```sh
+recins -f Name -v Saboter -f Playtime -v 30 $database
+recins -f Name -v Chess -f Playtime -v 30 $database
+```
+
+View all games, or select one by number:
+
+```sh
+recsel $database
+recsel -n 0 $database
+```
+
+Each game should note whether or not you have played it yet, so you can add that field and set the default to `yes`.
+
+```sh
+f=played
+v=yes
+recset -f $f -a $v $database
+```
+
+...but the field is wrong, it should have a capital letter:
+
+```sh
+new_field=Played
+recset -f $f --rename $new_field
+```
+
+## Read
+
+Check how many records the database has:
+
+```sh
+recinf $database
+```
+
+Look at just the games you've never played:
+
+```sh
+recsel --expression="Played = 'no'" $database
+```
+
+Print how many, then just print the names:
+
+```sh
+recsel -e "Played = 'no'" --count $database
+recsel -e "Played = 'no'" --print=Name $database
+```
+
+## Update
+
+To change a game's `Played` field from `no` to `yes`, use `recset` to specify the number, and change that field.
+
+```sh
+num=0
+f=Played
+value=yes
+recsel --number=$num $database
+recset --number=$num -f $f --set=$value $database
+```
+
+Find all games with a playtime of `30`, and set the field `Max_Players` to `4`.
+
+```sh
+recset -e "Playtime = 40" -f Max_Players --set 50 games.rec
+```
+
+This doesn't work, because that field does not exist.
+You can `--set-add` the field, to add it wherever it does not exist.
+
+```sh
+recset -e "Playtime = 40" -f Max_Players --set-add 50 games.rec
+```
+
+## Delete
+
+Remove `Played` record from first game:
+
+```sh
+num=0
+recset --number=$num -f Played --delete $database
+```
+
+You can comment the line instead of deleting it:
+
+```sh
+num=1
+recset --number=$num -f Played --delete $database
+recsel $database
+cat $database
+```
+
+Delete an entire record:
+
+```sh
+num=2
+recdel --number=$num $database
+```
+

data/recfiles/ip_asn.md

@@ -0,0 +1,16 @@
+---
+title: "IP Addresses with Recfiles"
+tags: [ "data", "recfiles", "games" ]
+requires: "Recfiles"
+---
+
+## Download the Database
+
+Download the csv data, and separate the ipv4 data from the ipv6.
+
+```sh
+curl -Lo ips.zip 'https://www.kaggle.com/api/v1/datasets/download/ipinfo/ipinfo-country-asn'
+unzip -p ips.zip country_asn.csv | csv2rec | recsel -e "start_ip ~ '\.'"  > ipv4.rec
+unzip -p ips.zip country_asn.csv | csv2rec | recsel -e "start_ip ~ '::'"  > ipv6.rec
+```
+

data/recfiles/recfixes.md

@@ -0,0 +1,33 @@
+---
+title: "Recfixes"
+tags: [ "data", "recfiles" ]
+requires: "Recfiles"
+---
+
+Sometimes `recsel` chokes on a large query, and you need to break the query into chunks with a pipe.
+
+This Kickstarter file has 374,853 records.
+Here's the chonky query:
+
+```sh
+recsel kick.rec -e "Category = 'Games'" -p "Subcategory,Avg(Goal)" -G Subcategory
+```
+
+It breaks down like this:
+
+| Chunk                         | Meaning                                       |
+|:-----------------------------:|:---------------------------------------------:|
+| `recsel kick.rec`             | Select records from `kick.rec`                |
+| `-e "Category = 'Games'"`     | Select only records where Category = 'Games'  |
+| `-p "Subcategory,Avg(Goal)"`  | Print the Subcategory and average goal        |
+| `-G "Subcategory"`            | Group by subcategory                          |
+
+Two ways to break the query apart:
+
+```sh
+recsel kick.rec -e "Category = 'Games'" | recsel -p "Subcategory,Avg(Goal)" -G "Subcategory"
+
+recsel kick.rec -e "Category = 'Games'" > games.rec
+recsel games.rec -p "Subcategory" -G "Subcategory"
+```
+

data/sc-im.md

@@ -1,33 +1,48 @@
 ---
 title: "sc-im"
-tags: [ "Documentation", "data" ]
+tags: [ "TUI", "data", "spreadsheet", ".csv" ]
+requires: [ "vim basics" ]
 ---
+
+- [Sample file](sc-im/sample.sc)
+
 # Basic Commands
 
-> H = highest part
+## See Cells
-> L = lowest part
-> gg = top
 
-> g$ = most right.
+Cells are hard to see.
-> g0 = most left.
+Change this with `:set autowrap`.
 
-> \ = insert middle
+Make `sc-im` always autowrap:
-> \> = insert left
-> < = insert right
 
-gb4 = to to cell b4
+```sh
+mkdir .config/sc-im/bash
+echo 'set autowrap' >> .config/sc-im/scimrc
+```
 
-> aa = see all text in cells
+## Movement
-> f = format cells so you can see it.
-> fl = format wider right
-> fh = format smaller left
 
-> fj = format wider down
+| Command                             | Key |
-> fk = format smaller down
+|:------------------------------------|:---:|
+| highest part                        | H   |
+| lowest part                         | L   |
+| top                                 | gg  |
+| most right.                         | g$  |
+| most left.                          | g0  |
+| insert middle                       | \   |
+| insert left                         | \>  |
+| insert right                        | <   |
+| to to cell b4                       | gb4 |
+| see all text in cells               | aa  |
+| format cells so you can see it.     | f   |
+| format wider right                  | fl  |
+| format smaller left                 | fh  |
+| format wider down                   | fj  |
+| format smaller down                 | fk  |
 
-# Edit
+## Edit
 
-## Text
+### Text
 
 | Action                | Key |
 |:----------------------|:---:|
@@ -35,7 +50,7 @@ gb4 = to to cell b4
 | text (right align)    | >   |
 | Edit existing  text   | E   |
 
-## Meta Actions
+### Meta Actions
 
 | Action                | Key |
 |:----------------------|:---:|
@@ -48,7 +63,7 @@ gb4 = to to cell b4
 |  delete a cell        | x   |
 
 
-## Functions
+### Functions
 
 | Action                          | Key          |
 |:--------------------------------|:------------:|
@@ -58,7 +73,7 @@ gb4 = to to cell b4
 |  minimumof those numbers        | =@min(B1:B8) |
 |  multiply C1 to C8              | =@prod(C1:C8)|
 
-## Visual
+### Visual
 
 | Action                          | Key          |
 |:--------------------------------|:------------:|

data/sc-im/convert_spreadsheets.md

@@ -0,0 +1,13 @@
+---
+title: "Convert Spreadsheets"
+tags: [ "data", "sc-im" ]
+---
+
+Convert between spreadsheet formats with `sc-im`.
+
+```sh
+sc-im --quiet --quit_afterload --nocurses --export_csv ${file}.xlsx
+sc-im --quiet --quit_afterload --nocurses --export_tab ${file}.sc
+sc-im --quiet --quit_afterload --nocurses --export_mkd ${file}.csv
+sc-im --quiet --quit_afterload --nocurses --export_txt ${file}.tsv
+```

data/sc-im/sample.sc

@@ -0,0 +1,38 @@
+# This data file was generated by the Spreadsheet Calculator Improvised (sc-im)
+# You almost certainly shouldn't edit it.
+
+newsheet "Sheet1"
+movetosheet "Sheet1"
+offscr_sc_cols 0
+offscr_sc_rows 0
+nb_frozen_rows 1
+nb_frozen_cols 0
+nb_frozen_screenrows 2
+nb_frozen_screencols 0
+format A 14 1 0
+format B 18 2 0
+format 0 2
+freeze 0
+label A0 = "Food by Weight"
+leftstring B0 = "No. Meals"
+leftstring A1 = "Ajvar"
+let A1 = 5
+let B1 = A1*$A$10
+leftstring A2 = "Apples"
+let A2 = 3
+let B2 = A2*$A$10
+leftstring A3 = "Rocket"
+let A3 = 0.2
+let B3 = A3*$A$10
+leftstring A4 = "Beli Cheese"
+let A4 = 1
+let B4 = A4*$A$10
+leftstring A6 = "Total"
+let A6 = @sum(A1:A4)
+leftstring B6 = "Total"
+let B6 = @sum(B1:B4)
+leftstring A7 = "Average"
+let A7 = @avg(A1:A4)
+leftstring A10 = "Weight of Meal"
+let A10 = 0.3
+goto A0

data/search_system.md

@@ -0,0 +1,49 @@
+---
+title: "Search System"
+tags: [ "data", "search", "locate", "plocate" ]
+requires: "cron"
+---
+
+You can search every file on the computer instantly by installing `plocate`.
+
+Once installed, run `sudo updatedb` to create the database of (nearly) every file on the computer.
+
+Check how big the database is:
+
+```sh
+du -h /var/lib/plocate/plocate.db
+```
+
+Once you have the database, you can find nearly any file instantly.
+
+- Search for gifs: `locate .gif`
+- Search for gifs in the `/usr/` directory: `locate /usr/ .gif`
+- Search for jpg images with 'dog' or 'Dog' in the name: `locate -i dog jpg`
+- Search for videos: `plocate --regex '.mp4$|.mkv$|.wmv$|.webm$|.mov$|.avi$'`
+
+For best results, run `updatedb` regularly, perhaps in [crontab](../system/cron.md).
+
+## Search More Places
+
+`plocate` will not search `/tmp/`, because nobody cares about those files, and won't search inside `/mnt/`, because that's where USB sticks get mounted, so the files keep changing as USB sticks come and go.
+
+Change where `plocate` searches by editing the configuration file at `/etc/updatedb.conf`.
+
+By default, the `/mnt` directory is 'pruned' from the database.
+So if you want to search `/mnt` for videos, remove the word `/mnt` from the configuration file.
+
+
+```sh
+su root
+cat /etc/updatedb.conf
+sed -i 's#/mnt/##' /etc/updatedb.conf
+updatedb
+exit
+```
+
+Now you can search in `/mnt` for films:
+
+```sh
+plocate --regex '.mp4$|.mkv$|.wmv$|.webm$|.mov$|.avi$'
+```
+

data/search_video_audio.md

@@ -0,0 +1,33 @@
+---
+title: "Search Video Audio"
+tags: [ "data", "video" ]
+---
+
+Check subtitles available:
+
+```sh
+url='https://videos.domainepublic.net/videos/watch/d9567d5b-1add-477c-bce3-a58cef84c28c'
+yt-dlp --list-subs "$url" | grep --max-count=1 '^en'
+```
+
+The original language often displays with  `-orig`, e.g. `en-orig (Original)`.
+
+```
+Language Formats
+ar       vtt
+az       vtt
+bg       vtt
+ca       vtt
+cs       vtt
+da       vtt
+de       vtt
+el       vtt
+en       vtt
+```
+
+Search youtube.com for videos on a topic, and download subtitles:
+
+```sh
+url="$(ytfzf -I l "$search" )" && \
+yt-dlp --write-subs --sub-format 'ass/srt/best/vtt' --sub-langs "en.*" --skip-download "$url"
+```

data/sharing_secrets.md

@@ -0,0 +1,23 @@
+---
+title: "Sharing Secrets"
+tags: [ "data", "death", "secrets", "ssss" ]
+---
+
+You can share parts of a secret with multiple people, so only some of them need to agree to see the secret.
+
+Install `ssss`, then decide on the total number of secrets (`N`), and the threshold of people who must share their shard of the secret in order to reveal the secret.
+
+```sh
+N=5
+T=3
+FILE=secret.txt
+fortune | ssss-split -t $T -n $N > $FILE
+```
+Each shard is a line inside secret.txt.
+
+Check it's working:
+
+```sh
+head -n $T $FILE | ssss-combine -t $T
+tail -n $T $FILE | ssss-combine -t $T
+```

data/soft-serve/maintenance.md

@@ -0,0 +1,24 @@
+---
+title: "Soft Serve Maintenance"
+tags: [ "data", "git server", "maintenance" ]
+requires: [ "git", "nginx" ]
+---
+
+Over time git repositories become bloated with old data, but never get cleaned.
+I can't find an official way to clean up the crud, so I did this:
+
+```sh
+usermod -aG soft-serve $USER
+# Log out and back in for this to take effect.
+
+cd /var/lib/soft-serve/data/repos
+sudo chmod -R g+w *
+git config --global --add safe.directory '*'
+du -sh *.git
+for repo in *.git; do
+    git -C "$repo" gc
+done
+du -sh *.git
+$EDITOR ~/.gitconfig
+# You should remove having everything marked 'safe'.
+```

data/soft-serve/soft_https.md

@@ -0,0 +1,71 @@
+---
+title: "Soft Serve through https"
+tags: [ "data", "git server", "lfs" ]
+requires: [ "git", "nginx" ]
+---
+
+## `http` Setup
+
+In this example, the port used is `23231`, but it can be anything.
+Open `/var/lib/soft-serve/data/config.yaml` and make sure the `http` section looks like this:
+
+```
+# The HTTP server configuration.
+http:
+  # The address on which the HTTP server will listen.
+  listen_addr: ":23232"
+
+  # The path to the TLS private key.
+  tls_key_path: ""
+
+  # The path to the TLS certificate.
+  tls_cert_path: ""
+
+  # The public URL of the HTTP server.
+  # This is the address that will be used to clone repositories.
+  # Make sure to use https:// if you are using TLS.
+  public_url: "http://localhost:23232"
+
+```
+
+Restart the `soft-serve` service, then check it's working by cloning from localhost:
+
+```sh
+git clone http://localhost:23232/${some_repo}.git
+```
+
+### `https` Setup
+
+Put this file at `/etc/nginx/sites-enabled/$DOMAIN.tld`, then set up standard certificates with [nginx](../networking/website/nginx.md).
+
+(replace `${DOMAIN_NAME}` with your domain's name).
+
+```
+ server {
+     listen 80;
+     server_name ${DOMAIN_NAME};
+                                                                                        
+     location / {
+         proxy_pass http://localhost:23232;
+         proxy_set_header Host $host;
+         proxy_set_header X-Real-IP $remote_addr;
+         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+     }
+                                                                                        
+     return 301 https://$server_name$request_uri;
+}
+                                                                                        
+ server {
+     listen 443 ssl;
+     server_name ${DOMAIN_NAME};
+
+     location / {
+         proxy_pass http://localhost:23232;
+         proxy_set_header Host $host;
+         proxy_set_header X-Real-IP $remote_addr;
+         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+     }
+}
+
+```
+

data/soft.md

@@ -0,0 +1,8 @@
+---
+title: "Soft-Serve"
+tags: [ "data", "git server", "lfs", "TUI" ]
+requires: [ "git", "nginx" ]
+---
+
+- [Soft-Serve with https](soft-serve/soft_https.md)
+- [Maintenance](soft-serve/maintenance.md)

data/sqlite.md

@@ -0,0 +1,21 @@
+---
+title: "sqlite"
+tags: [ "data" ]
+---
+
+Work with a database:
+
+```sh
+sqlite3 "$FILE".sqlite3
+```
+Compress the database:
+
+```sqlite
+pragma vacuum;
+```
+Optimize the database:
+
+```sqlite
+pragma optimize;
+```
+

data/task/contexts.md

@@ -0,0 +1,34 @@
+---
+title: "Taskwarrior Contexts"
+tags: [ "data", "task" ]
+requires: [ "Taskwarrior" ]
+---
+
+# Contexts
+
+Set three contexts by their tags:
+
+```sh
+task context define work +sa or +hr
+```
+
+```sh
+task context define study +ed or +void or +rat
+```
+
+```sh
+task context define home -sa -hr -ed -void -rat
+```
+
+Change to the first context.
+
+```sh
+task context work
+```
+
+Then stop.
+
+```sh
+task context none
+```
+

data/task/task.md

@@ -1,23 +1,35 @@
 ---
-title: "task"
+title: "Taskwarrior"
-tags: [ "Documentation", "Organization" ]
+tags: [ "data", "organization" ]
 ---
 
 Set up the configuration file:
 
-```bash
+```sh
 task
 ```
 
+Taskwarrior published a new feature to synchronize tasks others, but the feature was not ready.
+The server's default installation instructions assume that users pay for hosting services.
+All listed providers run proprietary software and actively support genocide.
+
+
+To ignore the synchronization, tell the configuration file to use a local synchronization file.
+
+```sh
+task config sync.local.server_dir
+task config data.location ~/.local/state/
+```
+
 Add a task:
 
-```bash
+```sh
 task add update linux
 ```
 
 See which task is next:
 
-```bash
+```sh
 task next
 ```
 
@@ -25,13 +37,13 @@ Note the id number.
 
 Mark a task as started:
 
-```bash
+```sh
 task start 1
 ```
 
 Once finished:
 
-```bash
+```sh
 task 1 done
 ```
 
@@ -39,23 +51,21 @@ task 1 done
 
 Add a project:
 
-```bash
+```sh
 task add project:house buy potted plant
 task add proj:house.repair buy screwdriver
 task add proj:house.repair buy shelf brackets
 task add pro:house.paint buy white paint
-task add pro:house.paint buy red paint
+
-task add pro:house.paint buy black paint
+for t in "buy red paint" "buy black paint" "buy brushes" ; do
-task add pro:house.paint buy brushes
+  task add pro:house.paint $t
+done
 ```
 
 ## Summary
 
-```bash
+```sh
 task pro:house sum
-```
-
-```bash
 task burndown.daily pro:house
 ```
 
@@ -63,69 +73,33 @@ The summaries will show how fast a project is being completed, and when you can
 
 # Tags
 
-```bash
+
+```sh
 task add +buy toothbrush
-```
-
-You can then see only tasks which involve buying something with:
-
-```bash
 task +buy
 ```
 
-# Contexts
-
-Set three contexts by their tags:
-
-```bash
-task context define work +sa or +hr
-```
-
-```bash
-task context define study +ed or +void or +rat
-```
-
-```bash
-task context define home -sa -hr -ed -void -rat
-```
-
-Change to the first context.
-
-```bash
-task context work
-```
-
-Then stop.
-
-```bash
-task context none
-```
-
 # Review
 
 View list of tasks completed in the last week:
 
-```bash
+```sh
 task end.after:today-1wk completed
 ```
 
 # User Defined Attributes
 
-Make a UDA 'size'.
+Define a new attribute for tasks called 'size'.
+The 'user defined attribute' (UDA) needs a `type` and `label`.
 
-```bash
+```sh
 task config uda.size.type string
-```
-
-```bash
 task config uda.size.label Size
 ```
+You can also ensure task tasks can only be `large`, `medium`, or `small`, then set a default.
 
-```bash
+```sh
 task config uda.size.values large,medium,small
-```
-
-```bash
 uda.size.default=medium
 ```
 
@@ -133,7 +107,7 @@ uda.size.default=medium
 
 This command shows tasks I'm most interested in:
 
-```bash
+```sh
 task next +ACTIVE or +OVERDUE or due:today or scheduled:today or pri:H
 ```
 

data/task/taskwarrior_configuration.md

@@ -0,0 +1,20 @@
+---
+title: "Taskwarrior Configuration"
+tags: [ "data", "task" ]
+requires: [ "Taskwarrior" ]
+---
+
+Show your current config:
+
+
+```sh
+task show
+```
+
+Use machine-readable output to make a config file with all configuration keys shown, then make it your configuration file.
+
+```sh
+task _show > ${file}
+mv ${file} ~/.config/task/taskrc
+```
+

data/task/timew.md

@@ -1,18 +1,18 @@
 ---
-title: "timew"
+title: "timewarrior"
-tags: [ "Documentation", "Data" ]
+tags: [ "data", "tracking", "time", "timew" ]
 ---
 # Summaries
 
 Try:
 
-```bash
+```sh
 timew summary :yesterday
 ```
 
 You can also use :week, :lastweek, :month, :quarter, :year, or a range such as:
 
-```bash
+```sh
 timew summary today to tomorrow
 timew today - tomorrow
 2018-10-15T06:00 - 2018-10-17T06:00
@@ -22,7 +22,7 @@ Each of these can gain with the :ids tag.
 
 # Basics
 
-```bash
+```sh
 timew start
 timew stop
 timew continue
@@ -32,7 +32,7 @@ timew tags
 
 And add ids with:
 
-```bash
+```sh
 timew summary :ids
 timew track 10am - 1pm timewarrior
 timew track 1pm for 2h walk
@@ -42,50 +42,50 @@ timew track 1pm for 2h walk
 
 First get ids.
 
-```bash
+```sh
 timew summary :ids
 ```
 
 Then if we're looking at task @2:
 
-```bash
+```sh
 timew move @2 12:00
 timew lengthen @2 3mins
 ```
 
-```bash
+```sh
 time shorten @2 40mins
 ```
 
 # Forgetting
 
-```bash
+```sh
 timew start 1h ago @4
 ```
 
 Or if your action actually had a break:
 
-```bash
+```sh
 timew split @8
 ```
 
 Or maybe not?
 
-```bash
+```sh
 timew join @4 @8
 timew @8 delete
 ```
 
 Start at previous time
 
-```bash
+```sh
 timew start 3pm 'Read chapter 12'
 timew start 90mins ago 'Read chapter 12'
 ```
 
 Cancel currently tracked time.
 
-```bash
+```sh
 timew cancel
 ```
 
@@ -157,11 +157,11 @@ with:
 
 # Fixing Errors
 
-```bash
+```sh
 curl -O https://taskwarrior.org/download/timew-dbcorrection.py
 ```
 
-```bash
+```sh
 python timew-dbcorrections.py
 ```
 

data/view_torrents.md

@@ -0,0 +1,11 @@
+---
+title: "View Torrents"
+tags: [ "data", "transmission", "torrenting" ]
+---
+
+
+```sh
+transmission-show $file.torrent  | less
+```
+
+`TRACKERS` shows where transmission will ask who has the torrent, but will probably be out of date.

data/w3m.md

@@ -1,10 +1,10 @@
 ---
 title: "w3m"
-tags: [ "Documentation", "browsers" ]
+tags: [ "browsers" ]
 ---
 Open a search tab:
 
-```bash
+```sh
 w3m ddg.gg
 ```
 

distros/android/ssh_to_phone.md

@@ -0,0 +1,28 @@
+---
+title: "ssh to phone"
+tags: [ "networking", "ssh", "android" ]
+---
+
+1. Install fdroid on phone.
+2. Install termux.
+3. Open fdroid, and run:
+
+
+```sh
+pkg upgrade
+pkg install busybox termux-services openssh openssh-sftp-server
+source $PREFIX/etc/profile.d/start-services.sh
+```
+
+`openssh-sftp-server` will mount the phone's file-system, and show you some directories in `~/storage/`.
+
+4. Copy your PC's ssh public key to the phone's downloads or somewhere, so you can see it in `~/storage/downloads`.
+5. On the phone:
+    * `yes | ssh-keygen`
+    * `cat $pubkey.pub >> ~/.ssh/authorized_hosts`.
+    * Check its ip address with `ifconfig | grep broadcast`
+    * Check the phone's username with with `whoami`
+    * `sshd -D`
+6. On the PC:
+    * `ssh -p 8022 -l $phone_username $phone_ip`
+

distros/arch/arch_pi_install.md

@@ -1,6 +1,6 @@
 ---
 title: "Arch on a Raspberry Pi 4"
-tags: [ "Documentation", "distros", "raspberry pi", "rpi" ]
+tags: [ "distros", "raspberry pi", "rpi" ]
 ---
 
 The [Official Instructions](https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-4) for a Raspberry pi 4 do not allow for working sound from the headphone jack, unless you use the aarch64 Installation.

distros/arch/autologin.md

@@ -1,13 +1,13 @@
 ---
 title: "autologin"
-tags: [ "Documentation", "Distros", "Arch" ]
+tags: [ "distros", "arch" ]
 ---
 
 # Automatic Login
 
 Edit `/etc/systemd/system/getty@tty1.service.d/override.conf` by typing:
 
-```bash
+```sh
 sudo systemctl edit getty@tty1
 ```
 

distros/arch/basic-install.md

@@ -1,20 +1,21 @@
 ---
 title: "basic-install"
-tags: [ "Documentation", "arch" ]
+tags: [ "arch" ]
+requires: [ "partitions", "time" ]
 ---
 Keyboard layout changed.
 
-```bash
+```sh
 ls /usr/share/kbd/keymaps/**/*.map.gz
 ```
 
-```bash
+```sh
 loadkeys uk.map.gz
 ```
 
 Check if boot mode is UEFI
 
-```bash
+```sh
 ls /sys/firmware/efi/efivars
 ```
 
@@ -22,115 +23,115 @@ Without efivars, the system must boot with BIOS.
 
 # Check network's up
 
-```bash
+```sh
 ping archlinux.org
 ```
 
 Set system clock properly
 
-```bash
+```sh
 timedatectl set-ntp true
 ```
 
 Check disks
 
-```bash
+```sh
 lsblk
 ```
 
 Make partition
 
-```bash
+```sh
 parted -s /dev/sda mklabel gpt
 ```
 
-```bash
+```sh
 parted -s /dev/sda mklabel msdos
 ```
 
-```bash
+```sh
 parted  -s /dev/sda mkpart primary ext4 512 100%
 ```
 
-```bash
+```sh
 parted -s /dev/sda set 1 boot on
 ```
 
-```bash
+```sh
 mkfs.ext4 /dev/sda1
 ```
 
 Use pacstrap to get the base install.
 
-```bash
+```sh
 mount /dev/sda1 /mnt/
 ```
 
-```bash
+```sh
 pacstrap /mnt base base-devel vim linux linux-firmware
 ```
 
 Make fstab notes for new system.
 
-```bash
+```sh
 genfstab -U /mnt >> /mnt/etc/fstab
 ```
 
-```bash
+```sh
 arch-chroot /mnt
 ```
 
-```bash
+```sh
 echo 'en_GB.UTF-8' > /etc/default/locale
 ```
 
-```bash
+```sh
 pacman -Sy networkmanager grub
 ```
 
 For legacy:
 
-```bash
+```sh
 grub-install --target=i386-pc /dev/sda
 ```
 
 For EFI:
 
-```bash
+```sh
 sudo pacman -S efibootmgr
 ```
 
-```bash
+```sh
 mkdir /boot/efi
 ```
 
-```bash
+```sh
 grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB --remmovable
 ```
 
-```bash
+```sh
 grub-mkconfig -o /boot/grub/grub.cfg
 ```
 
 set local time
 
-```bash
+```sh
 ln -sf /usr/share/zoneinfo/Europe/Belgrade /etc/localtime
 ```
 
 Find the desired locale's and uncomment them.
 
-```bash
+```sh
 vi /etc/locale.gen
 ```
 
-```bash
+```sh
 locale-gen
 ```
 
 Make your keyboard changes permenent with:
 
-```bash
+```sh
 vi /etc/vconsole.conf
 ```
 
@@ -139,13 +140,13 @@ unsure about this bit - is this name just for the loadkeys function?
 
 Make a hostname
 
-```bash
+```sh
 echo pc > /etc/hostname
 ```
 
 Set hostnames for network, or at least your own.
 
-```bash
+```sh
 vi /etc/hosts
 ```
 
@@ -159,27 +160,27 @@ If the system has a permanent IP address, it should be used instead of localhost
 
 Ping some sites to make sure the network's working
 
-```bash
+```sh
 passwd
 ```
 
-```bash
+```sh
 exit
 ```
 
-```bash
+```sh
 umount -R /mnt
 ```
 
 Remove that awful beep sound:
 
-```bash
+```sh
 rmmod pcspkr
 ```
 
 ...and make the change permanent:
 
-```bash
+```sh
 sudo echo "blacklist pcspkr" >> /etc/modprobe.d/nobeep.conf
 ```
 

distros/arch/fonts.md

@@ -1,24 +1,25 @@
 ---
 title: "fonts"
-tags: [ "Documentation", "distros" ]
+tags: [ "distros" ]
 ---
 # Basics
 
 Update font-cache:
 
-```bash
+```sh
+su root
 fc-cache
 ```
 
 List fonts:
 
-```bash
+```sh
 fc-list
 ```
 
 Grab the part of the font name you need for Xresources:
 
-```bash
+```sh
 fc-list | cut -d: -f2
 ```
 

distros/arch/gpu.md

@@ -1,6 +1,6 @@
 ---
-title: "fonts"
+title: "Ach Linux GPU Setup"
-tags: [ "Documentation", "distros" ]
+tags: [ "arch", "GPU" ]
 ---
 # Step 1: Multilib
 
@@ -13,7 +13,7 @@ Include = /etc/pacman.d/mirrorlist
 
 And update:
 
-```bash
+```sh
 sudo pacman -Syu
 ```
 
@@ -21,7 +21,7 @@ sudo pacman -Syu
 
 Check your graphics card type:
 
-```bash
+```sh
 lspci  | grep VGA
 ```
 
@@ -31,7 +31,7 @@ lspci  | grep VGA
 
 If you see `Nvidia`, then install the intel drivers:
 
-```bash
+```sh
 sudo pacman -S --needed lib32-mesa vulkan-intel lib32-vulkan-intel vulkan-icd-loader lib32-vulkan-icd-loader
 ```
 
@@ -39,7 +39,7 @@ sudo pacman -S --needed lib32-mesa vulkan-intel lib32-vulkan-intel vulkan-icd-lo
 
 If you see `Intel`, then install the intel drivers:
 
-```bash
+```sh
 sudo pacman -S --needed lib32-mesa vulkan-intel lib32-vulkan-intel vulkan-icd-loader lib32-vulkan-icd-loader xf86-video-intel
 ```
 
@@ -47,17 +47,16 @@ sudo pacman -S --needed lib32-mesa vulkan-intel lib32-vulkan-intel vulkan-icd-lo
 
 If you see `AMD`, then check your card support `vulkan`:
 
-```bash
+```sh
 yay -S gpu-viewer
 ```
 
-```bash
+```sh
 vulkaninfo | grep 'VkPhysicalDeviceVulkanMemoryModelFeatures' -A 3
 ```
 
 You should see 'true' here.
 
-```bash
+```sh
 sudo pacman -S --needed lib32-mesa vulkan-radeon lib32-vulkan-radeon vulkan-icd-loader lib32-vulkan-icd-loader xf86-video-amdgpu
 ```
-

distros/arch/maintenance.md

@@ -0,0 +1,53 @@
+---
+title: "Maintenance"
+tags: [ "arch" ]
+---
+
+# Package Cache
+
+Clean the cache of old packages in `/var/cachepacman/pkg/`:
+
+```sh
+ls /var/cache/pacman/pkg/ | wc -l
+sudo pacman -Sc
+ls /var/cache/pacman/pkg/ | wc -l
+```
+And the same for `yay` (with `-Yc` to remove old dependencies):
+
+```sh
+ls ~/.cache/yay/ | wc -l
+yay -Sc
+yay -Yc
+ls ~/.cache/yay/ | wc -l
+```
+
+# New Configs
+
+If you chance a configuration file, such as `/etc/environment`, and `pacman` wants to update the file, it will place `/etc/environment.pacnew`.
+
+Check the new files, then look at the difference between the `pacman` version, and your version.
+
+```sh
+sudo find /etc/ /var/ /usr/ -name "*.pacnew" 
+diff /etc/pacman.d/mirrorlist*
+```
+
+Either,
+
+- Update the files manually,
+
+```sh
+sudo -e /etc/pacman.d/mirrorlist
+sudo rm /etc/pacman.d/mirrorlist.pacnew
+```
+
+Or,
+
+- use a tool like `pacdiff` to view the changes next to each other, and select them with `vim`.
+
+
+```sh
+sudo pacman -S pacman-contrib
+sudo pacdiff
+```
+

distros/arch/pacman.md

@@ -1,19 +1,19 @@
 ---
 title: "pacman"
-tags: [ "Documentation", "distros" ]
+tags: [ "distros" ]
 ---
 
 Packages are kept in /var/cache/pacman/pkg.
 
 Delete unused old packages with:
 
-```bash
+```sh
 sudo pacman -Sc
 ```
 
 Signatures are handled by the pacman-key, initially set up with:
 
-```bash
+```sh
 sudo pacman-key --populate archlinux
 ```
 
@@ -23,31 +23,31 @@ sudo pacman-key --refresh-keys
 
 If you have usigned keys, you can refresh with:
 
-```bash
+```sh
 sudo pacman -Sc
 ```
 
 or 
 
-```bash
+```sh
 sudo pacman -Scc
 ```
 
 Reset all keys with:
 
-```bash
+```sh
 sudo rm -r /etc/pacmand.d/gnupg/ && sudo pacman-key --init
 ```
 
 If you're constantly getting 'everything corrupted, nothing upgraded', try running:
 
-```bash
+```sh
 sudo pacman -S archlinux-keyring
 ```
 
 List all orphaned packages:
 
-```bash
+```sh
 sudo pacman -Qtdq
 ```
 

distros/arch/scripts/archpi.sh

@@ -1,57 +0,0 @@
-#!/bin/bash
-
-# https://www.unixmen.com/install-arch-linux-raspberry-pi/
-
-pacman-key --init || echo init fail >> log
-pacman-key --populate archlinuxarm || echo update fail >> log
-pacman -Syyuu || echo update fail  >> log
-
-sed -i s/#en_GB.UTF-8 UTF-8/en_GB.UTF-8 UTF-8/ /etc/locale.gen
-
-echo 'LANG=en_GB.UTF-8' >> /etc/locale.conf
-
-locale-gen
-
-pacman -S base-devel htop ranger tmux lolcat fortune-mod git figlet rxvt-unicode task timew calcurse fail2ban
-# texlive-most 
-if [[ $2 == all || $1 == all ]]; then
-	pacman -S nnn feh dmenu rofi xf86-video-fbdev xorg xorg-xinit xorg-server xorg-server-utils xterm
-fi
-
-# Audio
-echo 'dtparam=audio=on' >> /boot/config.txt
-
-if [[ $1 == audio ]]; then
-	pacman -S alsa-utils alsa-firmware alsa-lib alsa-plugins 
-fi
-
-echo 'device_tree_param=spi=on' >> /boot/config.txt
-
-# for a vnc viewer
-if [[ $1 == vnc ]]; then
-	tigervnc gcc geany i3 i3status compton feh sxiv rxvt-unicode 
-fi
-
-# Swap
-
-cd /var/cache/swap
-
-dd if=/dev/zero of=swapfile bs=1K count=2M
-
-chmod 600 swapfile
-
-mkswap swapfile
-
-swapon swapfile
-
-echo "/var/cache/swap/swapfile none swap sw 0 0" > /etc/fstab
-
-# fail2ban
-
-[ -e sshd.local ] && \
-pacman -S fail2ban && \
-mv sshd.local /etc/fail2ban/jail.d && \
-systemctl start fail2ban
-
-# If it won't reboot, install `arch-install-scripts` then try again and firstly:
-# genfstab / > /etc/fstab

distros/arch/scripts/gitea_install.sh

@@ -1,9 +0,0 @@
-#!/bin/sh
-pacman -S gitea postgresql
-sudo su postgres -c 'initdb -D /var/lib/postgres/data'
-sudo systemctl start postgresql
-sudo su postgres -c 'createuser -P gitea'
-sudo su postgres -c 'createdb -O gitea gitea'
-sudo sed -i 's/mysql/postgres/' /etc/gitea/app.ini
-sudo sed -i 's/root/gitea/' /etc/gitea/app.ini
-sudo systemctl start gitea

distros/arch/scripts/pihole.sh

@@ -1,79 +0,0 @@
-#!/bin/bash
-
-set -e
-
-yay -S pi-hole-ftl pi-hole-server
-
-# Configuration in /etc/pihole/pihole-FTL.db
-# You can change DBINTERVAL to 60 or more to limit writes to disk
-
-sudo systemctl disable --now systemd-resolved
-sudo systemctl enable --now pihole-FTL
-pihole -g
-pihole -c
-
-if [ "$1" == "unbound" ]; then
-
-sudo pacman -S unbound
-
-sudo cp /etc/unbound/unbound.conf /etc/unbound/unbound.conf.old
-
-echo "server:
-    # If no logfile is specified, syslog is used
-    # logfile: "/var/log/unbound/unbound.log"
-    verbosity: 0
-
-    interface: 127.0.0.1
-    port: 5335
-    do-ip4: yes
-    do-udp: yes
-    do-tcp: yes
-
-    # May be set to yes if you have IPv6 connectivity
-    do-ip6: no
-
-    # You want to leave this to no unless you have *native* IPv6. With 6to4 and
-    # Terredo tunnels your web browser should favor IPv4 for the same reasons
-    prefer-ip6: no
-
-    # Use this only when you downloaded the list of primary root servers!
-    # If you use the default dns-root-data package, unbound will find it automatically
-    #root-hints: "/var/lib/unbound/root.hints"
-
-    # Trust glue only if it is within the server's authority
-    harden-glue: yes
-
-    # Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS
-    harden-dnssec-stripped: yes
-
-    # Don't use Capitalization randomization as it known to cause DNSSEC issues sometimes
-    # see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details
-    use-caps-for-id: no
-
-    # Reduce EDNS reassembly buffer size.
-    # Suggested by the unbound man page to reduce fragmentation reassembly problems
-    edns-buffer-size: 1472
-
-    # Perform prefetching of close to expired message cache entries
-    # This only applies to domains that have been frequently queried
-    prefetch: yes
-
-    # One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.
-    num-threads: 1
-
-    # Ensure kernel buffer is large enough to not lose messages in traffic spikes
-    so-rcvbuf: 1m
-
-    # Ensure privacy of local IP ranges
-    private-address: 192.168.0.0/16
-    private-address: 169.254.0.0/16
-    private-address: 172.16.0.0/12
-    private-address: 10.0.0.0/8
-    private-address: fd00::/8
-    private-address: fe80::/10
-" | sudo   tee /etc/unbound.conf
-
-	echo "Make this the  only pihole DNS: PIHOLE_DNS_1=127.0.0.1 in /etc/pihole/setupVars.conf"
-
-fi
-

distros/arch/scripts/steam.sh

@@ -1,8 +0,0 @@
-#!/bin/bash
-
-flatpak --user remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
-
-flatpak --user install flathub com.valvesoftware.Steam
-
-flatpak run com.valvesoftware.Steam
-

distros/arch/scripts/yay.sh

@@ -1,10 +0,0 @@
-git clone https://aur.archlinux.org/yay.git
-
-cd yay
-
-makepkg -si
-
-yay -S perl-graph-easy signal-desktop sc-im ncpamixer xdg-utils-mimeo torrench
-
-yay -S ttf-tengwar-annatar
-

distros/debian/apt.md

@@ -1,6 +1,6 @@
 ---
 title: "apt"
-tags: [ "Documentation", "distros" ]
+tags: [ "distros" ]
 ---
 ## apt
 
@@ -8,27 +8,27 @@ tags: [ "Documentation", "distros" ]
 
 Messed up a package's configuration files?
 
-```bash
+```sh
 sudo apt-get purge [thing]
 ```
 
-```bash
+```sh
 sudo apt autoremove 
 ```
 
 Check if you still have related things:
 
-```bash
+```sh
 apt search [thing]
 ```
 
-```bash
+```sh
 sudo apt-get install [ thing ]
 ```
 
 Still have problems?
 
-```bash
+```sh
 sudo dpgk --force-confmiss -i /var/cache/apt/archives/[thing]
 ```
 

distros/void/aeroplanes.md

@@ -1,18 +1,24 @@
 ---
 title: "Aeroplane Mode in Void"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 Put your device in 'aeroplane' mode (e.g. where no trace of signal leaves it) by turning off Wi-Fi and blue-tooth.
 
-> sudo sv stop wpa_supplicant bluetoothd
+```sh
+su root
+sv stop wpa_supplicant bluetoothd
+```
 
-Find your device's name with `ip a`.
+Find your device's name with `ip -color addr`.
 If unsure, try this:
 
-> name=$(ip a | grep -Eo 'wlp\w{3}')
+```sh
-
+name=$(ip a | grep -Eo 'wlp\w{3}')
-> echo $name
+echo $name
+```
 
 Then set that device down:
 
-> sudo ip link set $name down
+```sh
+ip link set $name down
+```

distros/void/autologin.md

@@ -1,11 +1,11 @@
 ---
 title: "Void Autologin"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 
 Make the autologin service:
 
-```bash
+```sh
 cp -R /etc/sv/agetty-tty1 /etc/sv/agetty-autologin-tty1
 ```
 

distros/void/brand_name_wallpaper.md

@@ -0,0 +1,33 @@
+---
+title: "Brand Name Wallpaper"
+tags: [ "void" ]
+---
+
+To automatically stick the logo onto your background, do these commands in the directory.
+
+Get the void linux logo from wikipedia
+
+```sh
+wget https://upload.wikimedia.org/wikipedia/commons/thumb/0/02/Void_Linux_logo.svg/256px-Void_Linux_logo.svg.png?20170131170632
+```
+
+Rename it, and resize it (the standard size is too small for most wallpapers)
+
+```sh
+convert -resize 200% '256px-Void_Linux_logo.svg.png?20170131170632' void-logo.png
+```
+Download a pretty wallpaper
+
+```sh
+wget http://wallpapercave.com/wp/Wlm9Gv0.jpg
+```
+
+Put the void logo on all *jpg and *png images
+
+```sh
+for x in *.jpg
+	do
+	composite -compose multiply -gravity Center void-logo.png "$x" "$x"
+done
+```
+

distros/void/extrace.md

@@ -1,22 +1,22 @@
 ---
 title: "extrace"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 Monitor all processes:
 
-```bash
+```sh
 extrace
 ```
 
 Monitor one process:
 
-```bash
+```sh
 extrace ls
 ```
 
 Monitor a script:
 
-```bash
+```sh
 ./script.sh | extrace
 ```
 

distros/void/jenkins.md

@@ -9,16 +9,17 @@ Jenkins is janky.
 ## Start
 Start the service file.
 
-```bash
+```sh
-sudo ln -s /etc/sv/jenkins /var/service
+su root
-sudo sv start jenkins
+ln -s /etc/sv/jenkins /var/service
+sv start jenkins
 ```
 
 Then visit the web interface with `$BROWSER localhost:8080`.
 
 If it's not working, try running the command from the run file the first time:
 
-```bash
+```sh
 chpst -u jenkins java -jar /opt/jenkins/jenkins.war
 ```
 

distros/void/locale.md

@@ -0,0 +1,55 @@
+---
+title: "Void locale"
+tags: [ "void", "locale" ]
+---
+
+Check the current locales:
+
+
+```sh
+locale -a
+```
+
+Add the languages you want by editing `/etc/default/libc-locales`, and uncommenting your choice:
+
+```sh
+#en_DK.UTF-8 UTF-8  
+#en_DK ISO-8859-1  
+en_GB.UTF-8 UTF-8  
+en_GB ISO-8859-1  
+#en_HK.UTF-8 UTF-8  
+#en_HK ISO-8859-1  
+```
+
+Now you can generate what you need for those languages.
+However, instead of generating what you need, you're going to generate everything which needs updating:
+
+
+```sh
+su root
+xbps-reconfigure glibc-locales
+```
+
+Finally, select your chosen locale by placing it in `/etc/locale.conf`.
+
+```sh
+echo "LC_ALL=en_GB.UTF-8
+LANG=en_GB.UTF-8
+LANGUAGE=en_GB.UTF-8" > /etc/locale.conf
+
+
+#en_DK.UTF-8 UTF-8  
+#en_DK ISO-8859-1  
+en_GB.UTF-8 UTF-8  
+en_GB ISO-8859-1  
+#en_HK.UTF-8 UTF-8  
+#en_HK ISO-8859-1  
+```
+
+Check your new locales are available:
+
+
+```sh
+locale -a
+```
+

distros/void/sv.md

@@ -1,18 +1,18 @@
 ---
 title: "sv"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 # List Services
 
 All possible services are in:
 
-```bash
+```sh
 ls /etc/sv
 ```
 
 The computer only uses those in /var/service, so symbolic links are made to start and stop services.
 
-```bash
+```sh
 ls /var/service
 ```
 
@@ -20,13 +20,13 @@ ls /var/service
 
 Enable the sshd service, so that ssh will work every time you boot up:
 
-```bash
+```sh
 sudo ln -s /etc/sv/sshd /var/service
 ```
 
 Then start the service:
 
-```bash
+```sh
 sudo sv start sshd
 ```
 
@@ -34,19 +34,19 @@ sudo sv start sshd
 
 Stop `mpd` with:
 
-```bash
+```sh
 sudo sv stop mpd
 ```
 
 And stop it automatically loading at startup with:
 
-```bash
+```sh
 sudo rm /var/service/mpd
 ```
 
 You can also just make a file called 'down':
 
-```bash
+```sh
 sudo touch /var/service/mpd/down
 ```
 
@@ -63,7 +63,7 @@ If unsure, use `#!/bin/bash` as the first line.  When Void Linux says `sh`, it m
 
 Confirm the shell you'll use:
 
-```bash
+```sh
 ls -l $(which sh)
 ```
 

distros/void/void_basics.md

@@ -1,12 +1,12 @@
 ---
 title: "Void Linux Basics"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 # Updates
 
 Update all packages with
 
-```bash
+```sh
 sudo xbps-install -Su
 ```
 
@@ -17,7 +17,7 @@ See [xbps](xbps.md) for more.
 Void keeps *every* version of everything you install, so you can roll back to them.
 Remove old packages with:
 
-```bash
+```sh
 sudo xbps-remove -O
 ```
 
@@ -25,19 +25,19 @@ sudo xbps-remove -O
 
 Old Void kernels are left on the boot partition.  List them with:
 
-```bash
+```sh
 vkpurge list
 ```
 
 Remove one with:
 
-```bash
+```sh
 vkpurge 2.8.2_4
 ```
 
 Remove all but the latest with:
 
-```bash
+```sh
 vkpurge rm all
 ```
 
@@ -48,7 +48,7 @@ You can change this number to change the screen brightness.
 
 For an easy utility, install `brightnessctl`.
 
-```bash
+```sh
 brightnessctl s 10%-
 brightnessctl s 10%+
 ```
@@ -57,5 +57,5 @@ brightnessctl s 10%+
 
 - [autologin](autologin.md)
 - [services](sv.md)
-- [wifi](wpa_cli.md)
+- [wifi](../../networking/wpa_supplicant.md)
 

distros/void/xbps.md

@@ -1,55 +1,55 @@
 ---
 title: "xbps"
-tags: [ "Documentation", "Void" ]
+tags: [ "void" ]
 ---
 ## Search
 
 Look for cowsay in the repository:
 
-```bash
+```sh
 xbps-query --repository --search cowsay
 ```
 
 Short version:
 
-```bash
+```sh
 xbps-query -Rs cowsay
 ```
 
 Search with regex:
 
-```bash
+```sh
 xbps-query --regex -Rs 'cow(s)?\w'
 ```
 
 List what's required for cowsay
 
-```bash
+```sh
 xbps-query -x cowsay
 ```
 
 What packages are orphaned (i.e. installed as a dependency for another package, which has since been removed)?
 
-```bash
+```sh
 xbps-query -O
 ```
 
 Show cowsay's dependencies.
 
-```bash
+```sh
 xbps-query -x cowsay
 ```
 
 This shows `perl`.
 To see what else depends on perl:
 
-```bash
+```sh
 xbps-query -X perl
 ```
 
 List all manually installed software.
 
-```bash
+```sh
 xbps-query -m
 ```
 
@@ -57,14 +57,14 @@ xbps-query -m
 
 Install cowsay
 
-```bash
+```sh
 xbps-install cowsay
 ```
 
 Upgrade current packages.
 `-R` looks at repositories, `-s` makes a sloppy search (for rough matches).
 
-```bash
+```sh
 xbps-install -Suv
 ```
 
@@ -72,19 +72,19 @@ xbps-install -Suv
 
 Remove cowsay
 
-```bash
+```sh
 xbps-remove cowsay
 ```
 
 ...and all dependencies
 
-```bash
+```sh
 xbps-remove -R cowsay
 ```
 
 Remove all orphaned dependencies.
 
-```bash
+```sh
 xbps-remove -o
 ```
 
@@ -94,19 +94,19 @@ Show information about cowsay
 
 Reinstall cowsay
 
-```bash
+```sh
 xbps-install -f cowsay
 ```
 
 Look for broken packages.
 
-```bash
+```sh
 sudo xbps-pkgdb -a
 ```
 
 And if you've found any, you might reconfigure all packages forcefully:
 
-```bash
+```sh
 sudo xbps-reconfigure -af
 ```