Make Your Plain Ubuntu to The Penetration Distro

Firstly, Happy new year to all. I hope this new year we will become to a new human. OK, now, talking about the new human, computer users in Internet can become a plain user, and trained user. The differences of those two users is trained user can make and change his or her computer with him/herself.

Maybe everyone want to be the trained user. This is for everyone that want to be a network security.
I found this on kaskus.us. The forum said that if you want to be a "gray hat" or a network security, you do not have to use the Penetrated Distribution. You can do it with your Ubuntu.
First, you must download the key. Backtrack.gpg
Then, open your terminal and write this

wget -q http://archive.offensive-security.com/backtrack.gpg -O- | sudo apt-key add -ok-

This command is used for add the BackTrack key. BackTrack is included in the Penetration Distribution.
Open your sources.list, and add this repository

deb http://archive.offensive-security.com pwnsauce main microverse macroverse restricted universe multiverse

Then type this:

urname@urcomputer:~$ sudo apt-get update

I've try it. But I fail. Here I use UNE (Ubuntu Netbook Edition) Lucid Lynx.
If the lucky in your side, the synaptic will show the penetration utility.
Good Luck!