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

SS(8)											    SS(8)

       ss - another utility to investigate sockets

       ss [options] [ FILTER ]

       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.

       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.

       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.

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

       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).


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