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jldugger
Asked: 2009-08-23 13:29:53 +0800 CST

How do I schedule a reboot on Linux?

  • 772

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?

linux

5 Answers

  1. Best Answer

    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).

    • 81

  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.

    • 19

  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

    • 8

  4. The easiest way I can think of is:

    # sleep 2h && reboot

    Run this as root.

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  5. echo "reboot" | at -m 23:00

    ....

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