user@1:~$ sudo netstat -lnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      721/apache2
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      599/sshd
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      699/mysqld
tcp6       0      0 :::22                   :::*                    LISTEN      599/sshd
udp        0      0 0.0.0.0:68              0.0.0.0:*                           540/dhclient3
Active UNIX domain sockets (only servers)
Proto RefCnt Flags       Type       State         I-Node   PID/Program name    Path
unix  2      [ ACC ]     STREAM     LISTENING     2289     1/init              @/com/ubuntu/upstart
unix  2      [ ACC ]     STREAM     LISTENING     3280     699/mysqld          /var/run/mysqld/mysqld.sock
==========================================================================================================
user@1:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:www

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination