Ss

SS(8)                                                                                                          SS(8)
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 fil-
                ters. 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).