Linux check which process is listening to a port, ex: 8080

A lsof command below will display which process is listening to port 8080:

lsof -i tcp:8080

Output:

[email protected]:~# lsof -i tcp:8080

COMMAND  PID    USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    1046 jenkins  161u  IPv6  15206      0t0  TCP *:http-alt (LISTEN)