Diagnostics
From Pengwings
List all system power on/off and uptime for each boot
last -x | grep -E 'shutdown|reboot'
Show system logs
From current boot
journalctl -b
From a specific boot
journalctl -b <entry>
Boot entry can be an offset, e.g. -1 will give you 1 boot earlier
journalctl -b -1
Same command, but limited to only showing kernel logs, add -k
journalctl -k -b -1
Time filtering
journalctl --since "2026-08-01 08:00:00" --until "2026-08-01 12:00:00"
Show logs of specific systemd service
journalctl -u containerd.service
