Lister les services démarrés

systemctl list-unit-files --state=enabled

Useful SystemD commands (hints for systemctl or systemctl vs chkconfig and service)
List all running services

systemctl

Start/stop or enable/disable services

systemctl start foo.service

Deactivates a service immediately:

systemctl stop foo.service

Restarts a service:

systemctl restart foo.service

Shows status of a service including whether it is running or not:

systemctl status foo.service

Enables a service to be started on bootup:

systemctl enable foo.service

Disables a service to not start during bootup:

systemctl disable foo.service

Check whether a service is already enabled or not:

systemctl is-enabled foo.service; echo $?