Various Command Line Interface tips and tricks
Some of the things at [[Ubuntu]] are Ubuntu Linux specific, some of them will work on other systems, including in the MacOS Terminal.
lsof -i :8080
Will list what’s running on port 8080.
Looking up the process ID (PID) means you can get more info, or kill [PID] to shut it down.
See also: Daniel Miessler’s An lsof Primer (2019)