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

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

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