Linux:kill process

When using Linux, what happens when a port is occupied and the process is started (but is not in a controlled state)?

When a known port is found to be occupied, you can use
NETSTAT-APN | grep yourport to view the PID of the process that occupies the port
Then use the KILL command to kill the process:
Kill-s 9 pid

If you know the program name, or if some ports may be used on the program path, you can use:
Ps-aux | grep processName can view the PID used by similar programs
You can then use the Kill-s 9 PID to kill the process

Linux:kill process