Now we are actually going to touch the target. This means we are going to be in contact with the contact system, and the more noise we make on the target system, the higher the probability that someone will discover our presence. So if you are concerned about someone detecting and responding to your presence on a target, then be as quiet as you possibly can. You’ll have to use your own judgment as to just how noisy you can be, depending on the circumstances of your particular engagement.
Some options that can be useful:
-c N where N is the number of pings you send
-n Print IP addresses in the ...