root@ubuntu:~# netstat -a

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 *:4321                  *:*                     LISTEN     
tcp        0      0 localhost:mysql         *:*                     LISTEN     
tcp6       0      0 *:1234                  *:*                     LISTEN     
udp        0      0 *:32768                 *:*                                
udp        0      0 *:5321                  *:*                                
udp        0      0 *:mdns                  *:*