netstat - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.
Show all ports
netstat -a
Show all tcp ports
netstat -at
Show all udp ports
netstat -au
Show only listening ports
netstat -l
Show only listening TCP ports
netstat -lt
Show only listening UDP Ports
netstat -lu
Show statistics for all ports
netstat -s
Show the PID and name of the program to which each socket belongs
netstat -p
Show numerical addresses instead of trying to determine symbolic host, port or user names.
netstat -n
Display the kernel routing information
netstat -r
Show all network interfaces
netstat -i
Display extended information on the interfaces
netstat -ie