Systemd

Commands and Locations

• custom services are stored here: /etc/systemd/system

• analyse security of service unit: systemd-analyze security <service_unit>

• restart a service: systemctl restart <application_name>.service

• show logs of a service: journalctl -u <application_name>.service

List Services

• list enabled services: systemctl list-unit-files --state=enabled

• list running services: systemctl list-units --type=service

• list failed services: systemctl --failed

• list timers: systemctl list-timers

List all since boot

• all boot cycles: journalctl -k -b all

• current boot : journalctl -k

• last boot: journalctl -k -b -1

• two boots prior: journalctl -k -b -2

• and so on

Journal

• delete old journal files (ony keep last 2 days): journalctl --vacuum-time=2d