Analyzing systemd Logs with journalctl

The journalctl tool queries the contents of the systemd journal.

The following command displays the messages that systemd generated the last time the machine started:

journalctl -b

The following command reveals the messages for the systemd service unit specified by the -u option:

journalctl -u auditd

In the above example, auditd is the system service unit.

For more information, see the journalctl man page by running the following command on Photon OS:

man journalctl

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