As Crontab stays in this post

http://www.backtrack-linux.org/forums/beginners-forum/864-installtion-error.html



These mathers can also "screw" up an installation proces.
I had cheap media...

I must say, I hear you as a fellow complete n00b.

But considered BackTrack is based on Ubuntu.
This forum message should be able to work.

Change the Home Folder Location !!!! - Ubuntu Forums

I normally use: shutdown now -P (P = powerdown)