Scheduling a reboot on a remotely located Ubuntu server
Solution 1
On the terminal type shutdown -r 10 Waiting 10 minutes before the restart&
that will make the server reboot in 10 mins, broadcast a message explaining that and pressing control+c will interrupt the reboot request.
On the terminal type shutdown -r 18:00 Rebooting at 18:00 hours&
that will make the server reboot at 18:00 hours, will broadcast a message explaining that and can be interrupted with control+c.
You can also interrupt any shutdown / reboot request on your "working" terminal with shutdown -a
.
Solution 2
You can also use at
to schedule reboots. For example sudo at 22:00
to run the command at 22:00 as root. Then enter the command you want to run: /sbin/shutdown -r now
and end with ctrl-d
. If you decide not to run this command, run sudo atrm 1
to delete the first one in the at
queue. With sudo atq
you can see the queue.
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nixnotwin
Updated on September 18, 2022Comments
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nixnotwin almost 2 years
I work on a ubuntu server located in a place where I don't usually go. I use ssh over openvpn to access it. The machine has multiple wired interfaces, many static routes and multiple default gateways to WAN. I frequently change interface adresses and routes. Most of the times the changes I do are temporarily--a reboot would reset the experiments I have done. In some cases some of those modifications have gone wrong, and the machine has gone offline. In such cases I had to call up someone at the place where the server is located to send the machine into a reboot.
Now I would like to schedule a reboot--lets say after 2 hours the machine should go into a reboot cycle. And in those two hours I can do whatever temporary experiments that I want. If all the temporary changes succeed then I should be able to prevent the "afer 2 hour" reboot from happening. So what I want is:
- How to tell the server to reboot after a certian time?
- If I decide that the machine should not go into a reboot, I should be able to cancel it.
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Alain O'Dea over 11 yearsThis is a bit problematic since it is interactive and blocks the shell you are running. I'm not sure if this would work predictably over SSH if the session drops.
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Sukima over 11 yearsThis solution is perfect!
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HDave about 11 yearsI could not find any combination of
nohup
andsudo
that would make this work if run from a normal ssh session as a normal admin group user. -
HDave about 11 yearsThis should be marked as the correct answer! The
at
family of commands is something every server admin should know. -
Andy Davies over 9 yearsCould this be run in combination with Screen to allow the command to be applied and the ssh session dropped?
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Tim Richardson almost 8 yearsin case you are new to
at
, first executesudo at 22:00
. This takes you into a kind of shell. Then you enter the command, andctrl-d
to exit. See also mixeduperic.com/ubuntu/…