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Date: Sat, 15 Oct 2005 08:48:12 +0100 (BST)
From: Anton Altaparmakov <aia21@cam.ac.uk>
To: Lee Revell <rlrevell@joe-job.com>
cc: Marc Perkel <marc@perkel.com>, linux-kernel@vger.kernel.org
Subject: Re: Forcing an immediate reboot
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References: <43505F86.1050701@perkel.com> <1129341050.23895.12.camel@mindpipe>
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On Fri, 14 Oct 2005, Lee Revell wrote:
> On Fri, 2005-10-14 at 18:46 -0700, Marc Perkel wrote:
> > Is there any way to force an immediate reboot as if to push the reset 
> > button in software? Got a remote server that i need to reboot and 
> > shutdown isn't working.
> 
> If it has Oopsed, and the "reboot" command does not work, then all bets
> are off - kernel memory has probably been corrupted.
> 
> Get one of those powerstrips that you can telnet into and power cycle
> things remotely.

If it has sysrq compiled in as root just do:

echo s > /proc/sysrq-trigger
echo u > /proc/sysre-trigger
echo s > /proc/sysrq-trigger
echo b > /proc/sysrq-trigger

This will "sync", "umount/remount read-only", "sync", "immediate hardware 
reboot".  Should always work...

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/ & http://www-stu.christs.cam.ac.uk/~aia21/
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