Stop node.js program from command line

Ctrl+Z suspends it, which means it can still be running.

Ctrl+C will actually kill it.

you can also kill it manually like this:

ps aux | grep node

Find the process ID (second from the left):

kill -9 PROCESS_ID

This may also work

killall node

To end the program, you should be using Ctrl + C. If you do that, it sends SIGINT, which allows the program to end gracefully, unbinding from any ports it is listening on.

See also: https://superuser.com/a/262948/48624