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 output
-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)