odoo@odoo:~$ netstat -atp tcp | grep -i "listen"
(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 odoo:domain             *:*                     LISTEN      -               
tcp        0      0 *:ssh                   *:*                     LISTEN      -               
tcp        0      0 localhost:ipp           *:*                     LISTEN      -               
tcp        0      0 localhost:postgresql    *:*                     LISTEN      -               
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN      -               
tcp6       0      0 ip6-localhost:ipp       [::]:*                  LISTEN