• Open a terminal/console/command prompt window.

    Type su to become root.

    type nmap -v -sP 192.168.1.1-254
I got the following

192.168.1.1 APPEARS TO BE UP
MAC ADDRESS 00:058:22:E5:17 (ARESCOM)

192.168.1.2 APPEARS TO BE UP


192.168.1.3 APPEARS TO BE UP
MAC ADDRESS 00:0A:E6:67:C1:CC ELITEGROUP COMPUTER SYSTEM (ECS)

The first one pings allright