Difference between revisions of "Journalctl"
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==See also== | ==See also== | ||
| − | * | + | * {{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> | ||
* <code>[[systemctl]]</code> | * <code>[[systemctl]]</code> | ||
Revision as of 06:02, 12 December 2019
Journalctl command allows to query the contents of the systemd journal/logs.
Configuration
/etc/systemd/journald.conf
Basic Commands
journalctl[1] orjournalctl --no-pagerjournalctl -r(reverse order)- journalctl -k : Show only kernel messages
journalctl -f(follow)journalctl -u service-name.service
journalctl -u libvirtd
journalctl --verify- Disk Usage/Logging:
/journalctl --disk-usage/ 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 --catalogIncludes explanations in log lines from message catalgog-bshow message from current boot. if [ID] is provided will show messages from that specific boot.
See also
- Systemd:
systemctl,systemd-journald,journalctlsystemd-cat,systemd-logind,systemd-networkd:networkctl,systemd-timesyncd,systemd-resolved,systemd-udevd[3],Systemd-logind: loginctl,hostnamectl,udevadm,systemd-run,portablectl,systemd-nspawn, systemd resource management, Timer (systemd), systemd logs,/etc/systemd/, systemd services,systemd-mount,/run/systemd/,.service,/usr/lib/systemd/,/usr/lib/systemd/system/,/usr/lib/systemd/system/systemd-resolved.service,/lib/systemd/, machinectl, systemd-oomd, systemd-analyze /etc/inittab[4] andrespawnoption[5]systemctl- launchd init and operating system service management daemon for MacOS
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Source: https://en.wikiversity.org/wiki/Linux_Administration/System_Services/System_Logging/Journalctl
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