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fundamentals/archives.md

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+# Automatic Backups with `find`
+
+> find /home/"$(whoami)" -type f -size -2M | xargs zip -u backup
+
+# Tar Archives
+
+Create ze files:
+
+> tar czf file.tar.gz file1 file2
+
+Extract ze files:
+
+> tar xzf file.tar.gz
+
+The .tar extension means two or more files are bundled together into a single file.  The .tar.gz means compression.
+
+Tarballs come with a number of arguments.
+
+- c means 'create'.
+
+- v means 'verbose'.
+
+- f means 'this is the file' and must always be the ultimate argument.
+
+- z means compression.
+
+So we can compress file1 and file2 into a single tar called 'archive' with:
+
+> tar czvf archive.tar.gz file1 file2
+
+Extraction uses 'x' instead of 'c'.
+
+> tar xzvf archive.tar.gz
+
+Create a very compressed file:
+
+> tar cfj super-compressed.tar.gz file1 file2
+
+# Example - Compressing all Latex Files in /home/
+
+> sudo find ~ -maxdepth 4 -name "*.txt" | xargs tar cvf latex-bundle.tar.gz
+
+# ssh backup
+
+Back up an unmounted partition with ssh:
+
+> sudo dd if=/dev/sda1 | ssh -C ghost@192.168.0.10 "dd of=/home/ghost/backup.img" status=progress
+
+# img.xz
+
+Unzip the image with:
+
+> unxz void.img.xz
+
+This then deletes the .xz file.  To keep it:
+
+> unxz --keep void.img.xz
+