8(PING)                                                   8(PING)

     NAME
          ping - probe the Internet

     SYNOPSIS
          ip/ping [-alq] [ -i interval ] [ -s size ] [ -n nping ]
          destination

     DESCRIPTION
          Ping sends ICMP echo requests to a network destination
          (which has the syntax accepted by sys-dial(2)). The target
          host, if up, should send a corresponding reply.  By default,
          one line is printed for each reply, containing the sequence
          number (starting at 0) of the message it answers, the round
          trip time for that reply, the average round trip time so
          far, and the `time to live' value from the reply packet.

          The options are:

          -a   include source and destination IP addresses in the out-
               put

          -i interval
               send requests with the given interval between messages,
               in milliseconds (default: 1 second)

          -l   list only lost messages

          -n nping
               send nping messages in all (default: 32)

          -q   suppress per-packet output, giving summary data only

          -s size
               send request packets of the given size in bytes
               (default: 64, minimum 32)

     SOURCE
          /appl/cmd/ip/ping.b

     SEE ALSO
          sys-dial(2), ip(3)

     DIAGNOSTICS
          Ping yields an error status if any request had no corre-
          sponding reply.

     BUGS
          Works only on native Inferno and when hosted on Plan 9,
          owing to the lack of access to ICMP on other hosted systems.

     Page 1                       Plan 9             (printed 3/29/24)