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by cnvogel 5882 days ago
Further information about how and what to trigger things with the Magic-Sysrq-Key is documented in $KERNEL/Documentation/sysrq.txt, which you can access for example in Linus' GIT tree at...

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6...

One very useful function, for example, is to force a hard reboot when ssh'ed into a server:

echo b >/proc/sysrq-trigger