Difference between revisions of "Journalctl"

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* <code>journalctl --verify</code>
 
* <code>journalctl --verify</code>
* Disk Usage/Logging: <code>[[journalctl --disk-usage]]</code>
+
 
 +
Disk Usage/Logging:  
 +
* <code>[[journalctl --disk-usage]]</code>
 
* <code>journalctl --vacuum-time=2d</code>
 
* <code>journalctl --vacuum-time=2d</code>
 
* <code>journalctl --vacuum-size=200M</code><ref>https://askubuntu.com/a/1012913</ref>
 
* <code>journalctl --vacuum-size=200M</code><ref>https://askubuntu.com/a/1012913</ref>

Revision as of 06:48, 28 January 2020

journalctl command allows to query the contents of the systemd journal/logs.

Configuration

Basic Commands

-u unit_name
journalctl -u service-name.service -f
journalctl -u libvirtd
journalctl -u ssh (See also sshd logs)
journalctl -u docker
  • journalctl --verify

Disk Usage/Logging:

  • journalctl --disk-usage
  • journalctl --vacuum-time=2d
  • journalctl --vacuum-size=200M[2]
    • --vacuum-size=BYTES Reduce disk usage below specified size
    • --vacuum-files=INT Leave only the specified number of journal files
    • --vacuum-time=TIME Remove journal files older than specified time
  • journalctl --list-boots. See also: last (command)
  • journalctl -xb
-x --catalog Includes explanations in log lines from message catalgog
-b show message from current boot. if [ID] is provided will show messages from that specific boot.

Activities

See also

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Source: https://en.wikiversity.org/wiki/Linux_Administration/System_Services/System_Logging/Journalctl

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