Journalctl clean up and tricks

Find the current Disk Usage by journalctl

journalctl --disk-usage

The safest way to remove unessesary entries is via the (means leave this amount left)

journalctl --vacuum-size=512M

After that you can verify if everything is still intact:

journalctl --verify

Or as generell setting in /etc/systemd/journald.conf

SystemMaxUse=512M

different approach:

SystemMaxFileSize=12M
SystemMaxFiles=10