ss -h

Usage: ss [ OPTIONS ]

       ss [ OPTIONS ] [ FILTER ]

   -h, --help           this message

   -V, --version        output version information

   -n, --numeric        don't resolve service names  不解析服务名称

   -r, --resolve       resolve host names            解析主机名

   -a, --all            display all sockets

   -l, --listening      display listening sockets    展示监听套接字

   -o, --options       show timer information        显示计时器信息

   -e, --extended      show detailed socket information  显示详细套接字信息

   -m, --memory        show socket memory usage

   -p, --processes      show process using socket    显示进程消息

   -i, --info           show internal TCP information

   -s, --summary        show socket usage summary    摘要信息

   -, --ipv4          display only IP version  sockets

   -, --ipv6          display only IP version  sockets

   -, --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 ]

ss -pl