Restart process on linux by its pidn number with kill command, how?
Solution 1:
There is no “restart” signal. You need to record the environment (environ, cwd, cmdline, security context…) from /proc/<pid> and manually start the process again.
SIGHUP is close, but it is only used by convention to ask the program to reload its settings.
Solution 2:
There is a "RELOAD" signal.
Assume you have a squid process with pid 1 runs in container, if you restart the squid process the container will exit. but you can "RELOAD" it like this:
kill -HUP 1