Show all listening and established ports TCP and UDP together with the PID of the associated process

netstat -plantu
Easy to remenber. Fot TCP only use: netstat -plant
Sample Output
[root@server ~]# netstat -plantu
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
tcp        0      0 127.0.0.1:5901              0.0.0.0:*                   LISTEN      13696/Xvnc
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      2161/rpcbind
tcp        0      0 0.0.0.0:56144               0.0.0.0:*                   LISTEN      2350/rpc.statd
tcp        0      0 0.0.0.0:6001                0.0.0.0:*                   LISTEN      13696/Xvnc
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      2584/sshd
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      2461/cupsd
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      2678/master
tcp        0      0 0.0.0.0:5672                0.0.0.0:*                   LISTEN      2733/qpidd
tcp        0     52 172.16.21.10:22             172.16.16.133:2977          ESTABLISHED 13889/sshd
udp        0      0 0.0.0.0:50341               0.0.0.0:*                               2332/avahi-daemon
udp        0      0 0.0.0.0:830                 0.0.0.0:*                               2350/rpc.statd
udp        0      0 0.0.0.0:33476               0.0.0.0:*                               2350/rpc.statd
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               2332/avahi-daemon
udp        0      0 0.0.0.0:750                 0.0.0.0:*                               2080/portreserve
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               2161/rpcbind
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               2461/cupsd
udp        0      0 0.0.0.0:634                 0.0.0.0:*                               2161/rpcbind

1
By: player27
2012-01-19 00:18:43

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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