bootproblems

Sat Aug 3 15:53:15 UTC 2013

I'm starting to see the following startup error the last few boots.

Aug  3 17:30:46 localhost systemd[1]: Started Disk Manager.
Aug  3 17:30:49 localhost systemd[1]: NetworkManager-wait-online.service: main 
process exited, code=exited, status=1/FAILURE
Aug  3 17:30:49 localhost systemd[1]: Failed to start Network Manager Wait 
Online.
Aug  3 17:30:49 localhost systemd[1]: Unit NetworkManager-wait-online.service 
entered failed state.

And then the boot process just seems to hang with some red failed message on 
the NetworkManager. Googling this I see various Bugzilla reports in RH, 
Fedora, and other distros.  Trying to extend the timeout period as mentioned 
in one of them.

What does the thing do?