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systemctl --failed: lists failed services
systemctl reboot: reboots the server but doesn't work on my scaleway
systemctl status: status of all running services
systemctl status <service>: status of a given service
journalctl -u unit -f: show logs for a given unit and —follow
systemctl daemon-reload: run after adding a new service file in e.g.
systemctl start <service-file>: runs a given service
systemctl enable <path-to-service-file>: enable a given service to run on startup
systemctl disable <service-file>
systemctl list-unit-files --state=enabled
systemctl cat <unit>: show content of Unit file