46 lines
570 B
Markdown
46 lines
570 B
Markdown
---
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title: journal
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tags:
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- systemd
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---
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See a running log of all system messages:
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```sh
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journalctl -f
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```
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Or just one user:
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```sh
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journalctl --user -f
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```
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Or just one unit (`sshd`):
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```sh
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journalctl -f -u sshd
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```
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Find errors since November
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```sh
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journalctl --since=2018-11-01 --grep="EXT4-fs error"
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```
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Limit size to 2G.
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```sh
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journalctl --vacuum-size=2G
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```
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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:
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```sh
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logger "Installed new dnsmasq"
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sudo journalctl -f
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```
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