1 .. -*- coding: utf-8 -*-

     2 

     3 ========

     4  Linux.

     5 ========

     6 .. contents::

     7 

     8 Linux distro.

     9 =============

    10 

    11   http://distrowatch.com/

    12                 Comparing Linux distros.

    13 

    14 SysRq.

    15 ======

    16 ::

    17 

    18   x86: ALT-SysRq-<command key>

    19   SPARC: ALT-STOP-<command key>

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

    21 

    22   'b' - reboot

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

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

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

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

    27   's' - attempt to sync all mounted filesystems

    28   'u' - remount all filesystems read-only

    29 

    30 You can put one of such line::

    31 

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

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

    34 

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

    36 

    37   kernel.sysrq = 1

    38 

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

    40                 Linux Magic System Request Key Hacks