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 sockets
       (e.g. TCP/UNIX/UDP) 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

       -Z, --context
              As the -p option but also shows process security context.

       -z, --contexts
              As  the  -Z option but also shows the socket context. The socket
              context is taken from the associated inode and is not the actual
              socket context held by the kernel. Sockets are typically labeled
              with the context of the creating process,  however  the  context
              shown will reflect any policy role, type and/or range transition
              rules applied, and is therefore a useful reference.

       -N NSNAME, --net=NSNAME
              Switch to the specified network namespace name.

       -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 fami-
              lies are supported: unix, inet, inet6, link, netlink.

       -A QUERY, --query=QUERY, --socket=QUERY
              List of socket tables to dump, separated by commas. The  follow-
              ing  identifiers are understood: all, inet, tcp, udp, raw, unix,
              packet,  netlink,   unix_dgram,   unix_stream,   unix_seqpacket,
              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

       syntax is sequence of keywords state and exclude followed by identifier
       of state.

       Available identifiers are:

              All standard TCP states: established, syn-sent,  syn-recv,  fin-
              wait-1,  fin-wait-2,  time-wait,  closed,  close-wait, last-ack,
              listen and closing.

              all - for all the states

              connected - all the states except for listen and closed

              synchronized - all the connected states except for syn-sent

              bucket - states,  which  are  maintained  as  minisockets,  i.e.
              time-wait and syn-recv

              big - opposite to bucket

       ss -t -a
              Display all TCP sockets.

       ss -t -a -Z
              Display all TCP sockets with process SELinux security contexts.

       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
              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),
       RFC 793 - (TCP states)

       ss was written by Alexey Kuznetsov, <>.

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

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