How do I schedule a reboot on Linux?
Solution 1
If it is one-time deal, you can use shutdown command with -r as argument. Instead of using shutdown now, you can add time as parameter (e.g. shutdown -r 12:30
).
Solution 2
According to the man page: /sbin/shutdown [-t sec] [-arkhncfFHP] time [warning-message] found at --> http://unixhelp.ed.ac.uk/CGI/man-cgi?shutdown+8
Load of options to choose from but, to answer your question.
To reboot in 5 minutes: /sbin/shutdown -r 5 "reboot in five minutes"
To reboot at exactly 11:00 P.M.: /sbin/shutdown -r 23:00 "rebooting at 11:00 P.M."
NOTE: your message will be broadcast to all active terminals / sessions.
Solution 3
the at
command is what you want.
at 5:00pm
do
cd /
/full/path/to/init 6
done
at -l
will list the at cmds
Solution 4
The easiest way I can think of is:
# sleep 2h && reboot
Run this as root.
Solution 5
echo "reboot" | at -m 23:00
....
Comments
-
jldugger over 1 year
I'd like to be able to schedule a server reboot at a specific time, but not regularly. How can I do this without futzing with adding and removing cron entries?
-
Kamrul over 14 yearsFor rebooting the -r flag is needed (e.g. shutdown -r 12:30)
-
egorgry over 14 years-r is critical otherwise you will be hitting a power button somewhere to bring it back up.
-
Dennis Williamson over 14 yearsI would use
shutdown
instead ofinit
. It's not necessary to do thecd
or thedo
/done
(which would probably produce an error). -
egorgry over 14 yearsreally? I've used this for over 8 years and I've never has an issue. hpux. solaris, linux 2.2 - 2.6
-
warren over 14 yearsI personally prefer
init 6
myself; had intermittent issues withshutdown -r
on some platforms in the past -
Josip Medved over 14 yearsThis is true, I forgot -r in initial answer. :( sorry.
-
Andrew over 14 yearsThis also works with times in the early morning - so if it's 15:55 now, you can use 'shutdown -r 03:15 &' to reboot the server at 3:15am tomorrow morning. (the '&' shunts the command the background so you can log-off without killing the shutdown command)
-
first6684 over 9 yearsThis has the advantage/drawback (depending on your use case) of alerting everyone every hour or so via a broadcast message of the upcoming reboot.
-
Tebe over 6 yearswhat's about root permissinos?
-
Omry over 6 yearsas I said, run it as root.