Find which process is listening on a particular port


til command-line

Use the lsof(list of open files) command to figure out which process is listening to a particular port

$ lsof -i:8080

The output looks something like the following:

$ lsof -i:8080
COMMAND   PID USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
nginx     950  raj    9u  IPv4 0x6e63a6f59d9b8a7f      0t0  TCP 127.0.0.42:http (LISTEN)
nginx    1060  raj    9u  IPv4 0x6e63a6f59d9b8a7f      0t0  TCP 127.0.0.42:http (LISTEN)

If you are interested in just the PIDs, use the -t option to get a terse output

$ lsof -t -i:8080
950
1060

Here is the man page for further options/reference.

See Also