On: Understanding how killall works using strace

[vacri]

What's the use case of that?

[moyix → vacri]

It survives in Linux as killall5 (the 5 being a reference to System V Unix). It's used during shutdown to send SIGTERM to all processes, then SIGKILL to kill off any stragglers.

[midas007 → vacri]

Cleaning up after a user's process that has something that's effectively a fork-bombing.

Also, terminating an employee.