45 lines
575 B
Markdown
45 lines
575 B
Markdown
---
|
|
title: "journal"
|
|
tags: [ "systemd" ]
|
|
---
|
|
|
|
See a running log of all system messages:
|
|
|
|
|
|
```sh
|
|
journalctl -f
|
|
```
|
|
|
|
Or just one user:
|
|
|
|
```sh
|
|
journalctl --user -f
|
|
```
|
|
|
|
Or just one unit (`sshd`):
|
|
|
|
```sh
|
|
journalctl -f -u sshd
|
|
```
|
|
|
|
Find errors since November
|
|
|
|
```sh
|
|
journalctl --since=2018-11-01 --grep="EXT4-fs error"
|
|
```
|
|
|
|
Limit size to 2G.
|
|
|
|
```sh
|
|
journalctl --vacuum-size=2G
|
|
```
|
|
|
|
Log the fact that you've installed your own `dnsmasq` on your system to `journalctl`, so that you can notice why your system's broken:
|
|
|
|
|
|
```sh
|
|
logger "Installed new dnsmasq"
|
|
sudo journalctl -f
|
|
```
|
|
|