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NAME

       ss - another utility to investigate sockets

SYNOPSIS

       ss [options] [ FILTER ]

DESCRIPTION

       ss  is  used  to  dump socket statistics. It allows showing information
       similar to netstat.  It can display more  TCP  and  state  informations
       than other tools.

OPTIONS

       These  programs  follow  the  usual  GNU command line syntax, with long
       options starting with two  dashes  (‘-’).   A  summary  of  options  is
       included below.

       -h, --help
              Show summary of options.

       -V, --version
              Output version information.

       -n, --numeric
              Do now try to resolve service names.

       -r, --resolve
              Try to resolve numeric address/ports.

       -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
              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.

       -4, --ipv4
              Display only IP version 4 sockets (alias for -f inet).

       -6, --ipv6
              Display only IP version 6 sockets (alias for -f inet6).

       -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=FAMILY
              Display  sockets  of  type  FAMILY.   Currently  the   following
              families are supported: unix, inet, inet6, link, netlink.

       -A QUERY, --query=QUERY
              List  of  socket  tables  to  dump,  separated  by  commas.  The
              following identifiers are understood: all, inet, tcp, udp,  raw,
              unix,  packet,  netlink,  unix_dgram,  unix_stream,  packet_raw,
              packet_dgram.

       -D FILE
              Do not display anything, just dump  raw  information  about  TCP
              sockets  to  FILE after applying filters. If FILE is - stdout is
              used.

       -F FILE, --filter=FILE
              Read filter  information  from  FILE.   Each  line  of  FILE  is
              interpreted  like single command line option. If FILE is - stdin
              is used.

       FILTER := [ state TCP-STATE ] [ EXPRESSION ]
              Please take a look at the official documentation (Debian package
              iproute-doc) for details regarding filters.

USAGE EXAMPLES

       ss -t -a
              Display all TCP sockets.

       ss -u -a
              Display all UDP sockets.

       ss -o state established ’( dport = :ssh or sport = :ssh )’
              Display all established ssh connections.

       ss -x src /tmp/.X11-unix/*
              Find all local processes connected to X server.

       ss  -o  state  fin-wait-1  ’(  sport  =  :http or sport = :https )’ dst
       193.233.7/24
              List  all  the tcp sockets in state FIN-WAIT-1 for our apache to
              network 193.233.7/24 and look at their timers.

SEE ALSO

       ip(8), /usr/share/doc/iproute-doc/ss.html (package iproute­doc)

AUTHOR

       ss was written by Alexey Kuznetosv, <kuznet@ms2.inr.ac.ru>.

       This manual page was written by Michael Prokop <mika@grml.org> for  the
       Debian project (but may be used by others).