Difference between revisions of "Journalctl"

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**--vacuum-size=BYTES  Reduce disk usage below specified size
 
**--vacuum-size=BYTES  Reduce disk usage below specified size
 
**--vacuum-files=INT    Leave only the specified number of journal files
 
**--vacuum-files=INT    Leave only the specified number of journal files
**--vacuum-time=TIME    Remove journal files older than specified time
+
**[[--vacuum-time]]=TIME    Remove journal files older than specified time
 
* <code>journalctl --list-boots</code>. See also: <code>[[last (command)]]</code>
 
* <code>journalctl --list-boots</code>. See also: <code>[[last (command)]]</code>
 
* <code>journalctl -xb</code>
 
* <code>journalctl -xb</code>

Latest revision as of 12:05, 28 September 2023

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

Configuration[edit]

Basic Commands[edit]

-u unit_name
journalctl -u service-name.service -f
journalctl -u libvirtd
journalctl -u ssh (See also sshd logs)
journalctl -u docker
journalctl -u prometheus
journalctl -u UNIT_NAME -n 1 -o verbose
journalctl -xn --nopager

Disk Usage/Logging:

-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.


  • journalctl --since "2 days ago"

Related terms[edit]

Activities[edit]

See also[edit]

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

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