How disable sysrq.
--- a/linux.rst Sun Mar 07 22:15:35 2010 +0200
+++ b/linux.rst Sun Mar 07 22:34:03 2010 +0200
@@ -14,8 +14,14 @@
'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