Journalctl: Difference between revisions
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Show messages for the specified systemd unit. This will add a match for messages from the unit ("_SYSTEMD_UNIT=") and additional matches for messages from systemd and messages about coredumps for the specified unit. This parameter can be specified multiple times. | Show messages for the specified systemd unit. This will add a match for messages from the unit ("_SYSTEMD_UNIT=") and additional matches for messages from systemd and messages about coredumps for the specified unit. This parameter can be specified multiple times. | ||
=-r= | =-r (reverse)= | ||
<pre> | <pre> | ||
Revision as of 16:26, 16 February 2016
Internal
Overview
journalctl may be used to query the contents of the systemd journal as written by systemd-journald.service.
If called without parameters, it will show the full contents of the journal, starting with the oldest entry collected.
-u (unit)
-u, --unit=
Show messages for the specified systemd unit. This will add a match for messages from the unit ("_SYSTEMD_UNIT=") and additional matches for messages from systemd and messages about coredumps for the specified unit. This parameter can be specified multiple times.
-r (reverse)
-r, --reverse
Reverse output, so the newest entries are displayed first.