TIL - Magic SysRq with SystemD
TIL, Today I Learned, is more of a "I just figured this out: here are my notes, you may find them useful too" rather than a full blog post
The Magic SysRq [1] is a ueful tool for debugging and recovering from a frozen system and is something I use frequently.
![/media/sysrq.jpg](/media/sysrq.jpg)
SystemD sets the permissions bitmask to 0x10 by default [2] , it means that only a subset of the available features is allowed.
To permamently enable all features, add kernel.sysrq = 1 to your sysctl configuration.
If you are only interrested in the current session, you can run either
1sysctl kernel.sysrq=1
or
1echo 1 > /proc/sys/kernel/sysrq