====== sysrq ======

Search tags:
  * Sys Request
  * sysrq 
  * Alt+SysRq
    * ''SysRq'' may be released before pressing the command key, as long as ''Alt'' remains held down. 
  * ''REISUB''

===== Emergency reboot from keyboard =====

**REISUB**
  * ''R'' - Switch the keyboard from raw mode, used by programs such as X11 and SVGAlib, to XLATE mode 
  * ''E'' - Send the SIGTERM signal to all processes except init (PID 1) 
  * ''I'' - Send the SIGKILL signal to all processes except init
  * ''S'' - Sync all mounted filesystems 
  * ''U'' - Remount all mounted filesystems in read-only mode 
  * ''B'' - Immediately reboot the system, without unmounting or syncing filesystems 

===== Emergency reboot from console =====

<code bash>
echo 1 > /proc/sys/kernel/sysrq 
echo s > /proc/sysrq-trigger
echo u > /proc/sysrq-trigger
echo b > /proc/sysrq-trigger
</code>