Shell Programming and Scripting

I have a problem with a script , i want to see my devices there are up in my network. I want as output the ip addresses of the devices and also the mac address but I only had the ip addresses

Code:

#!/bin/bash

while [[ -n "$@" ]]
do

 -mac)
    Extension=5
    shift
    mac=$1
    shift
    ;;
esac
done

if [ "$Extension" -eq 5 ] ; then
  ip=192.168.1.$mac
   if nmap -sP -n -r $ip | grep "is up" >/dev/null ; then
      echo "${ip} is up"
   fi
fi

If (and it is a big if) you are plugged into the same switch and/or in the same subnet, then a single ping followed by reading the output of arp might do the trick for you. As soon as you are going through the router, then you cannot find it from the 'client' end. You would need to connect to each server in turn and get the MAC directly.



I hope that this helps,
Robin