1 -*- mode: outline; coding: utf-8 -*-

     2 

     3 * SysRq.

     4 

     5   x86: ALT-SysRq-<command key>

     6   SPARC: ALT-STOP-<command key>

     7   PPC: ALT - Print Screen (or F13) - <command key>

     8 

     9   'b' - reboot

    10   'p' - dump the current registers and flags to your console

    11   'r' - take control of keyboard back from X

    12   'e' - send SIGTERM to all processes, except for init

    13   'i' - send SIGKILL to all processes, except for init

    14   's' - attempt to sync all mounted filesystems

    15   'u' - remount all filesystems read-only

    16 

    17 You can put one of such line:

    18 

    19   $ echo 0 > /proc/sys/kernel/sysrq  # disable

    20   $ echo 1 > /proc/sys/kernel/sysrq  # enable

    21 

    22 to your /etc/rc.local or alternativaly place under /etc/sysctl:

    23 

    24   kernel.sysrq = 1

    25 

    26   http://www.kernel.org/doc/Documentation/sysrq.txt

    27                 Linux Magic System Request Key Hacks