Difference between revisions of "Journalctl"

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(→‎Basic Commands: * <code>journalctl --vacuum-time=2d</code>)
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==See also==
 
==See also==
 +
* {{journald}}
 
* {{journalctl}}
 
* {{journalctl}}
 
* {{systemd}}
 
* {{systemd}}
 
* <code>/etc/[[inittab]]</code><ref>https://linux.die.net/man/5/inittab</ref> and <code>respawn</code> option<ref>https://superuser.com/questions/507576/how-to-automatically-restart-a-linux-background-process-if-it-fails</ref>
 
* <code>/etc/[[inittab]]</code><ref>https://linux.die.net/man/5/inittab</ref> and <code>respawn</code> option<ref>https://superuser.com/questions/507576/how-to-automatically-restart-a-linux-background-process-if-it-fails</ref>
 
* [[launchd]] init and operating system service management daemon for [[MacOS]]
 
* [[launchd]] init and operating system service management daemon for [[MacOS]]
* {{journald}}
 
 
* {{logging}}
 
* {{logging}}
 
* {{du}}
 
* {{du}}

Revision as of 06:45, 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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