$ netstat -nap|grep 6003 (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) tcp 0 0 0.0.0.0:16003 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:6003 0.0.0.0:* LISTEN - tcp 4 0 127.0.0.1:6003 127.0.0.1:43549 CLOSE_WAIT - tcp 4 0 127.0.0.1:6003 127.0.0.1:43812 CLOSE_WAIT - tcp 4 0 127.0.0.1:6003 127.0.0.1:43849 CLOSE_WAIT - tcp 4 0 127.0.0.1:6003 127.0.0.1:43880 CLOSE_WAIT - tcp 0 0 127.0.0.1:6003 127.0.0.1:43436 ESTABLISHED - tcp 0 0 127.0.0.1:43849 127.0.0.1:6003 FIN_WAIT2 - tcp 0 0 127.0.0.1:43880 127.0.0.1:6003 FIN_WAIT2 - tcp 0 0 127.0.0.1:43436 127.0.0.1:6003 ESTABLISHED -