# netstat -lnptu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      443/sshd
tcp6       0      0 :::22                   :::*                    LISTEN      443/sshd