journalctl -r

journalctl -r | egrep -i "error|critical"

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

Related

• critical
• Logs
• systemctl enable
• journalctl --disk-usage

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