Help vraag.

[Eddie]

Vraag van Ubuntu beginner:

Kan Ubuntu niet meer afsluiten.

En krijg bij afsluiten Ubuntu de volgende meldingen:
Could not get the systembus.
Make sure the message bus daemon is running.
Message:did not receive a reply.
Possible cause include: the remote application did not send a reply / the
message bus security policy blocked the reply / the reply time out expired /
or the network connection was broken.

umount:/run/lock:not mounted
umount:run/shm:not mounted
will now halt

Hoe is dit afsluit probleem te verhelpen??