determine the TCP port on which a node.js program listens

index.md

Find the pid of the running process if you don't know it:

$ ps ax | grep node
1012 ?        Ssl    0:03 node /usr/bin/signalhub listen -p 8000

In this case we're running a node program and it's pid is 1012

$ lsof -Pan -p 1012 -i
COMMAND  PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
node    1012 ubuntu   10u  IPv6  15437      0t0  TCP *:8000 (LISTEN)

Ahh, this program is listening on port 8000 !