SS


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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, –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-2.6.32/ss.ps (package iproute-doc)

 

AUTHOR

ss

was written by Alexey Kuznetosv, <[email protected]>.

This manual page was written by Michael Prokop <[email protected]>
for the Debian project (but may be used by others).



 

Index



NAME

SYNOPSIS

DESCRIPTION

OPTIONS

USAGE EXAMPLES

SEE ALSO

AUTHOR



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