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sysrq-trigger

Magic SysRq key - emergency controls.

Ubuntu CentOS Debian Arch SUSE Fedora
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Syntax
$echo COMMAND > /proc/sys/kernel/sysrq
Examples
Examples
$echo s > /proc/sysrq-trigger (sync)
Examples
$echo u > /proc/sysrq-trigger (umount)
Typical use cases
Sync
echo s > /proc/sysrq-trigger
Umount
echo u > /proc/sysrq-trigger
Note Emergency system control.
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