--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux.rst	Tue Apr 24 11:59:33 2012 +0300
@@ -0,0 +1,40 @@
+.. -*- coding: utf-8 -*-
+
+========
+ Linux.
+========
+.. contents::
+
+Linux distro.
+=============
+
+  http://distrowatch.com/
+                Comparing Linux distros.
+
+SysRq.
+======
+::
+
+  x86: ALT-SysRq-<command key>
+  SPARC: ALT-STOP-<command key>
+  PPC: ALT - Print Screen (or F13) - <command key>
+
+  'b' - reboot
+  'p' - dump the current registers and flags to your console
+  'r' - take control of keyboard back from X
+  'e' - send SIGTERM to all processes, except for init
+  'i' - send SIGKILL to all processes, except for init
+  's' - attempt to sync all mounted filesystems
+  'u' - remount all filesystems read-only
+
+You can put one of such line::
+
+  $ echo 0 > /proc/sys/kernel/sysrq  # disable
+  $ echo 1 > /proc/sys/kernel/sysrq  # enable
+
+to your /etc/rc.local or alternativaly place under /etc/sysctl::
+
+  kernel.sysrq = 1
+
+  http://www.kernel.org/doc/Documentation/sysrq.txt
+                Linux Magic System Request Key Hacks