Date: 2020mar27 OS: Linux Q. journalctl: limit the journal size A. To see how much space is currently used:

journalctl --disk-usage

To immediately free up the same do:

journalctl --vacuum-size=200M

File /etc/systemd/journald.conf set SystemMaxUse to the value you want as follows:

[Journal] ... SystemMaxUse=200M ...

Then restart it:

systemctl restart systemd-journald

More info at `man journald.conf`