~$ service cups start
start: Rejected send message, 1 matched rules; type="method_call", sender=":1.63" (uid=1000 pid=2301 comm="start cups ") interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init")
~$