sockstat -l4 you should see something like: USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN ADDRESS root sshd 432 4 tcp4 *:22 *:* root lpd 72 7 tcp4 *:515 *:* root syslogd 60 5 udp4 *:514 *:* root inetd 445 4 tcp4 *:21 *:*