How systemd stop command actually works

Question

I am using a systemd service which calls a process when it\'s been \"started\" (e.g.$systemctl start test.service). As per the design, the process stays for ever in a loop,

Answer 1

By default, a SIGTERM is sent, followed by 90 seconds of waiting followed by a SIGKILL.

Killing processes with systemd is very customizable and well-documented.

I recommend reading all of man systemd.kill as well as reading about ExecStop= in man systemd.service.

To respond to those signals, refer to the signal handling documentation for the language you are using.