I am running Ubuntu 16.04 LTS and I am having problems shutting down and restarting the computer. I trigger a shutdown, the computer eventually says

Reached target shutdown
and halts. It does not power off.

So, what problem may I have and what should I do to solve it?

  • Well, it says Reached target shutdown and halts! Jul 23 '18 at 15:21
  • 1
    Is that not a successful shutdown?!?
    – Jeff Schaller
    Jul 23 '18 at 15:22
  • I don't think so since my system won't power off! Jul 23 '18 at 15:23
  • Please edit your question and include the details you added in the comments. Also tell us something about your hardware. Is this a laptop? A desktop? Are you connected to a network? Are you mounting any remote shares from the network?
    – terdon
    Jul 23 '18 at 15:33
  • 2
    You still haven't followed the standard litany and told the world what you did to trigger the shutdown. For all we know, shutting down to halt is exactly what you told the computer to do.
    – JdeBP
    Jul 23 '18 at 15:33

As @JdeBP said, you have not clarified what exactly you did. However, the answer to your questions may lie in the man page:

man shutdown

Which tells us,

shutdown may be used to halt, power-off or reboot the machine.

So for your questions,

I am having problems shutting down and restarting the computer

It does not power off

to reboot, you should run (if you didn't already),

shutdown -r

and if you're trying to power off,

shutdown -P 

Also, have a look at this question which mentions the exact thing you do: https://askubuntu.com/questions/632591/system-does-not-power-off-on-poweroff-just-halts

And this question talks more about the commands halt and shutdown: https://askubuntu.com/questions/73696/what-is-the-proper-terminal-way-to-shutdown


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