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Linux 2.6 - man page for ss (linux section 8)

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
       When no option is used ss displays a list of open  non-listening  TCP  sockets  that  have
       established connection.

       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 not try to resolve service names.

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

       -a, --all
	      Display  both  listening	and non-listening (for TCP this means established connec-
	      tions) sockets.

       -l, --listening
	      Display only listening sockets (these are omitted by default).

       -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 (alias for -f link).

       -t, --tcp
	      Display TCP sockets.

       -u, --udp
	      Display UDP sockets.

       -d, --dccp
	      Display DCCP sockets.

       -w, --raw
	      Display RAW sockets.

       -x, --unix
	      Display Unix domain sockets (alias for -f unix).

       -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).

											    SS(8)


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