ss(8) [centos man page]

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.

       -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.

       -b, --bpf
	      Show socket BPF filters (only administrators are allowed to get these information).

       -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, --socket=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, --diag=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-3.10.0/ss.ps (package iproute-doc)

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)

Check Out this Related Man Page

SOCKSTAT(1)						    BSD General Commands Manual 					       SOCKSTAT(1)

NAME

     sockstat -- list open sockets

SYNOPSIS

     sockstat [-46cLlu] [-j jid] [-p ports] [-P protocols]

DESCRIPTION

     The sockstat command lists open Internet or UNIX domain sockets.

     The following options are available:

     -4 	 Show AF_INET (IPv4) sockets.

     -6 	 Show AF_INET6 (IPv6) sockets.

     -c 	 Show connected sockets.

     -j jid	 Show only sockets belonging to the specified jail ID.

     -L 	 Only show Internet sockets if the local or foreign addresses are not in the loopback network prefix 127.0.0.0/8, or do not con-
		 tain the IPv6 loopback address ::1.

     -l 	 Show listening sockets.

     -p ports	 Only show Internet sockets if either the local or foreign port number is on the specified list.  The ports argument is a comma-
		 separated list of port numbers and ranges specified as first and last port separated by a dash.

     -P protocols
		 Only show sockets of the specified protocols.	The protocols argument is a comma-separated list of protocol names, as they are
		 defined in protocols(5).

     -u 	 Show AF_LOCAL (UNIX) sockets.

     If neither -4, -6 or -u is specified, sockstat will list sockets in all three domains.

     If neither -c or -l is specified, sockstat will list both listening and connected sockets.

     The information listed for each socket is:

     USER	      The user who owns the socket.

     COMMAND	      The command which holds the socket.

     PID	      The process ID of the command which holds the socket.

     FD 	      The file descriptor number of the socket.

     PROTO	      The transport protocol associated with the socket for Internet sockets, or the type of socket (stream or datagram) for UNIX
		      sockets.

     LOCAL ADDRESS    For Internet sockets, this is the address the local end of the socket is bound to (see getsockname(2)).  For bound UNIX
		      sockets, it is the socket's filename.  For other UNIX sockets, it is a right arrow followed by the endpoint's filename, or
		      ``??'' if the endpoint could not be determined.

     FOREIGN ADDRESS  (Internet sockets only) The address the foreign end of the socket is bound to (see getpeername(2)).

     If a socket is associated with more than one file descriptor, it is shown multiple times.	If a socket is not associated with any file
     descriptor, the first four columns have no meaning.

SEE ALSO

     fstat(1), netstat(1), procstat(1), inet(4), inet6(4), protocols(5)

HISTORY

     The sockstat command appeared in FreeBSD 3.1.

AUTHORS

     The sockstat command and this manual page were written by Dag-Erling Smorgrav <des@FreeBSD.org>.

BSD
								   May 16, 2012 							       BSD

Linux and UNIX Man Pages

ss(8) [centos man page]

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