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/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)