proc is a semantic CLI tool for process management on macOS, Linux and Windows. Find what's on a port, why it's there, and stop it, in one command you'd guess on the first try.

Ends whatever is listening on port 3000 immediately (SIGKILL). Asks first, and --dry-run previews.

Anything else is a name, matched against each process's name and full command line, so node also finds nodemon and node server.js.