Comment by stackedinserter

14 days ago

TIL that

> uutils read it as “send the default signal to PID -1”, which on Linux means every process you can see.

What's the use case for killing all process you can see?

Many cases, including as a last resort as part of shutdown, to try to trigger remaining services into a graceful exit (although these days cgroups help avoid ever being in such a situation).