wireless card for Linux - Ubuntu

Just installed Linux and trying it out.  Looked for instructions online but the instructions don't work well. 

http://ubuntuguide.org/wiki/Dapper
The last part is confusing and it's the guide that's explains most so far.

how to solve your problem:

sudo gedit /etc/X11/xorg.conf

What chipset for the wireless card do you have?

It would help if you told us what wireless card you have.