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Reboot Linux box after a kernel panic

Posted by Vivek on Friday November 16, 07 @7:18 am

If you want the server to get rebooted automatically after kernel hit by a pain error message, try adding panic=N to /etc/sysctl.conf file.

It specify kernel behavior on panic. By default, the kernel will not reboot after a panic, but this option will cause a kernel reboot after N seconds. For example following boot parameter will force to reboot Linux after 10 seconds.

Open /etc/sysctl.conf file

# vi /etc/sysctl.conf

When kernel panic's, reboot after 10 second delay

kernel.panic = 10

Save and close the file. Alternatively, you may want to enable and use magic system request keys (SysRq).

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Discussion on This Article:

  1. Anonymous Says:

    Thanks for this tip. My computer had a kernel panic for the first time a couple of weeks ago and I had no choice but to reboot it manually.

  2. mangoo Says:

    One can also add panic=10 to the kernel command line, it will have exactly the same effect.

    Of course, it’s possible to change it later with sysctl, or by writing to /proc:

    echo 10 > /proc/sys/kernel/panic

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