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Special Forums News, Links, Events and Announcements Software Releases - RSS News The Freiburg Project 2.5 (Default branch)
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Old 01-21-2009
The Freiburg Project 2.5 (Default branch)
The Freiburg project is an infrastructure for linking applications together to act like a single application. This is done using unix or inet domain sockets. The framework handles all aspects of setting up and maintaining the link in addition to starting and stopping the different applications, starting and stopping the communication interface, sending and receiving packages, reading and writing data from or into packages, setting up and maintaining the event handling for asynchronous transfers, and propagating warnings or errors. License: GNU General Public License (GPL) Changes:
This release has code cleanup with minor feature improvements. Support has been added for "PIPE" communication using socketpair as the default for local communication. Support has been added for "fork" on TCP/UDS servers to replace the external "astarter" tool. A lot of new documentation was added. Image

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LEARN ABOUT LINUX

ss

SS(8)							      System Manager's Manual							     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 connections) 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)