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-*- mode: outline; coding: utf-8 -*-
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* SysRq.
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x86: ALT-SysRq-<command key>
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SPARC: ALT-STOP-<command key>
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PPC: ALT - Print Screen (or F13) - <command key>
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'b' - reboot
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'p' - dump the current registers and flags to your console
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'r' - take control of keyboard back from X
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'e' - send SIGTERM to all processes, except for init
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'i' - send SIGKILL to all processes, except for init
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's' - attempt to sync all mounted filesystems
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'u' - remount all filesystems read-only
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You can put one of such line:
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$ echo 0 > /proc/sys/kernel/sysrq # disable
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$ echo 1 > /proc/sys/kernel/sysrq # enable
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to your /etc/rc.local or alternativaly place under /etc/sysctl:
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kernel.sysrq = 1
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http://www.kernel.org/doc/Documentation/sysrq.txt
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Linux Magic System Request Key Hacks
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