====== Clear SystemD Journal ======

On any server, the logs can start to add up and take considerable amount of disk space. Systemd conveniently stores these in /var/log/journal and has a systemctl command to help clear them.

==== Clear systemd journals older than X days ====

The first one is time-based, clearing everything older than say 10 days.

<code bash>
$ journalctl --vacuum-time=10d
...
Vacuuming done, freed 2.3G of archived journals on disk.
</code>

Alternatively, you can limit its total size.

==== Clear systemd journals if they exceed X storage ====

This example will keep 2GB worth of logs, clearing everything that exceeds this.

<code bash>
$ journalctl --vacuum-size=2G
...
Vacuuming done, freed 720.0M of archived journals on disk.
</code>

Afterwards, your /var/log/journal should be much smaller.