ss

ss is one another utility to investigate sockets. Functionally it is not better than netstat combined with some perl/awk scripts and though it is surely faster it is not enough to make it much better. :-) So, stop reading this now and do not waste your time. Well, certainly, it proposes some functionality, which current netstat is still not able to do, but surely will soon.

Documentation

• man 8 'ss' [EN]

Syntax

ss [PARAMETER ...] [FILTER]

Parameters

-4, --ipv4

Display only IP version 4 sockets (alias for -f inet).

-6, --ipv6

Display only IP version 6 sockets (alias for -f inet6).

-a, --all

Display all sockets.

-l, --listening

Display listening sockets.

-s, --summary

Print summary statistics. This option does not parse socket lists obtaining summary from various sources. It is useful when amount of sockets is so huge that parsing /proc/net/tcp is painful.

-t, --tcp

Display only TCP sockets.

-u, --udp

Display only UDP sockets.