SysRq Method

SysRq call directly in the kernel and therefore, you must not use this combination other than to solve system unresponsive problems. With a little mistake manipulation, you can loose all your unsaved work!

Difficulty level:

⭐⭐⭐

If your system become unresponcive, you can use SysRq to perform kernel level actions to troubleshoot your system.

Activation

By default, all versions of Vincent OS have SysRq enabled. You can verify if SysRq is activated by opening a terminal and enter this command:

Vincent OS Standard Edition:

PS> Get-Content /proc/sys/kernel/sysrq

Vincent OS Legacy Edition:

$ cat /proc/sys/kernel/sysrq

If there is other values returned than 1, enable the SysRq via the command:

Vincent OS All Editions:

sudo sysctl kernel.sysrq=1

REISUB Method

REISUB Method is a memotecnical way to troubleshoot the Operating System in case of a unresponcive system.

You can reboot your system using the REISUB Method, here's how to do it:

Keyboard Shortcut	Description
Alt+SysRq+R	Switch keyboard mode from RAW mode to XLATE mode.
Alt+SysRq+E	Send SIGTERM to all processes (except init).
Alt+SysRq+I	Send SIGKILL to all processes.
Alt+SysRq+S	Sync all data to disk.
Alt+SysRq+U	Unmount and remount all filesystems to read-only.
Alt+SysRq+B	Reboot.

More informations can be found on ArchLinux wiki and Wikipedia:

Keyboard shortcuts - ArchWiki

Keyboard Shortcut

Magic SysRq keyWikipedia

Magic SysRq key