O Ubuntu 15.04 e acima estão usando o systemd, no entanto, ainda é suportado pelo SysV init.
Para iniciar, parar, reiniciar, verificação de status:
systemctl <action> <prog>
Por exemplo:
root@mylenovo:~# systemctl status cups
● cups.service - CUPS Scheduler
Loaded: loaded (/lib/systemd/system/cups.service; enabled; vendor preset: enabled)
Active: active (running) since Sel 2015-11-10 20:45:33 MYT; 8min ago
Docs: man:cupsd(8)
Main PID: 710 (cupsd)
CGroup: /system.slice/cups.service
├─710 /usr/sbin/cupsd -l
├─789 /usr/lib/cups/notifier/dbus dbus://
├─790 /usr/lib/cups/notifier/dbus dbus://
├─791 /usr/lib/cups/notifier/dbus dbus://
├─794 /usr/lib/cups/notifier/dbus dbus://
└─796 /usr/lib/cups/notifier/dbus dbus://
Nov 10 20:45:33 mylenovo systemd[1]: Started CUPS Scheduler.