journalctl --disk-usage

Disk Usage/Logging: journalctl --disk-usage

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

• /var/log/journal/

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

Related

• journalctl --vacuum-time=2d
• journalctl --vacuum-size=200M
• journalctl --vacuum-files=10
• journald.conf (SystemMaxUse= entry)
• journalctl --flush && journalctl --rotate && journalctl --vacuum-time=1s
• apt-get clean or apt-get autoclean
• 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
• du, du -hs, Disk space usage, df, ls, tree, find, docker system df, journalctl --disk-usage, No space left on device, ENOSPC, sar -F, growpart, resize2fs, ncdu, duf, dua-cli, macOS disk space

https://unix.stackexchange.com/a/457902