Direct kernel communication
"Direct kernel communication" on https://aligot-death.space, available at https://aligot-death.space/wiki/sysadmin/linux/direct-kernel-communication-en
Can be useful in case of partially stalled or locked system
Alt, press SysRq (The SysRq being the Print Screen key), release SysRq, press <command key>, Hit ALT-SysRq-<command key>, release everything.
Or if possible,
1 echo t > /proc/sysrq-trigger
with t being the command key.
See the wikipedia page for full command key list.
Can't beat a tool that has a "Perform a system crash" feature.