[ubuntu-uk] Installing a wireless driver on a machine converted to Ubuntu from Windows

[Rowan Berkeley]

Hi,
As you may recall, I bought a Compaq CQ58 with Windows 8 on it, and 
converted it to Ubuntu 12.10 using a USB stick. I have tried to follow 
the instructions given here in rather scattered form:
http://ubuntuforums.org/showthread.php?t=2103062
I installed linux-headers-generic build-essential, as they say to do, 
then I downloaded what is apparently the most recent driver:
http://www.orbit-lab.org/kernel/compat-wireless-3-stable/v3.6/compat-wireless-3.6.8-1-snpc.tar.bz2
and the terminal said it had saved it with exactly that title. But I 
can't extract it with a cd command, no matter how I phrase it, because I 
get "no such file or directory". Why is that?