ss –h

[root@node0 net]# ss -h

Usage: ss [ OPTIONS ]

ss [ OPTIONS ] [ FILTER ]

-h, --help this message

-V, --version output version information

-n, --numeric don't resolve service names

-r, --resolve resolve host names

-a, --all display all sockets

-l, --listening display listening sockets

-o, --options show timer information

-e, --extended show detailed socket information

-m, --memory show socket memory usage

-p, --processes show process using socket

-i, --info show internal TCP information

-s, --summary show socket usage summary

-4, --ipv4 display only IP version 4 sockets

-6, --ipv6 display only IP version 6 sockets

-0, --packet display PACKET sockets

-t, --tcp display only TCP sockets

-u, --udp display only UDP sockets

-d, --dccp display only DCCP sockets

-w, --raw display only RAW sockets

-x, --unix display only Unix domain sockets

-f, --family=FAMILY display sockets of type FAMILY

-A, --query=QUERY, --socket=QUERY

QUERY := {all|inet|tcp|udp|raw|unix|packet|netlink}[,QUERY]

-D, --diag=FILE Dump raw information about TCP sockets to FILE

-F, --filter=FILE read filter information from FILE

FILTER := [ state TCP-STATE ] [ EXPRESSION ]