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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?

terdon
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Mukesh Aryal
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    Well, it says `Reached target shutdown` and halts! – Mukesh Aryal Jul 23 '18 at 15:21
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    Is that not a successful shutdown?!? – Jeff Schaller Jul 23 '18 at 15:22
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    I don't think so since my system won't power off! – Mukesh Aryal 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
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    You still haven't [followed the standard litany](http://jdebp.info./FGA/problem-report-standard-litany.html) 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
  • An example of what we need to help you: https://askubuntu.com/questions/632591/system-does-not-power-off-on-poweroff-just-halts – andcoz Jul 24 '18 at 13:01

1 Answers1

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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

Community
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Anas
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  • Enjoy https://superuser.com/a/900205/38062 , https://unix.stackexchange.com/a/196014/5132 , and https://unix.stackexchange.com/a/196471/5132 as well. – JdeBP Jul 23 '18 at 17:04