I'm new to Linux and I found out that after my installation of Xubuntu 12.04, my wireless card was not being detected by Xubuntu. I found out that there are some drivers that I need to install in order for my wireless card to be detected. I found out that my type of card requires a b43legacy driver. I am wondering how to install these drivers and also where to get the exact file(s). I have also heard that if I am connected via ethernet cable, I can simply install "additional drivers". Is this true?