Journalctl --disk-usage

Disk Usage/Logging: journalctl --disk-usage

journalctl --disk-usage 
Archived and active journals take up 9.8M in the file system.

• journalctl -r | grep "No space left on device"

See also

• systemd-journald: journalctl, /etc/systemd/journald.conf, journalctl logs, journalctl --list-boots, journalctl --disk-usage, journalctl -u kubelet, journalctl -u prometheus, journalctl --help
• File system, du, df, find, ls, mkdir, touch, locate