How to: Remove/Clear journal log files (To free some storage) for Debian/Ubuntu etc.

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Journal logs are stored in “/var/log/journal” folder

journal logs
journal logs

Check journal log file size

We can open that folder to check manually or use “ncdu” command, we can also use dedicate journalctl command

sudo journalctl --disk-usage
sudo journalctl --disk-usage
sudo journalctl –disk-usage

Change maximum journal log folder size

1 Open “/etc/systemd/journald.conf” file

2 Change or add following line

SystemMaxUse=

To a size you prefer

SystemMaxUse=100M

Force log rotation

sudo systemctl kill --kill-who=main --signal=SIGUSR2 systemd-journald.service
 
sudo systemctl restart systemd-journald.service

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