Backtrack 5 is the Linux based Penetration testing Operating System. We use Konsole /terminal to check our own ip address..

 Start your Backtrack Operating System and click on the konsole.


Now when your console /terminal is open enter the command ifconfig
ifconfig: ifconfig is the command in the Linux that shows both the ip address and the MAC address of your operating system.
Check the image above which shows you how to give the command and where the ip address and MAC address are shown to you