i installed madwifi but still no wireless extensions i cant install this adapter help 
:’(
it is likely that your wireless card is pci
so if you tap
/sbin/lspci
into a terminal, and copy and paste the results back, that gets things started
Axel often recommends this excellent diagnostic script; that may even tell you the answer you want:
try running this as well
collectNWData Überblick / Overview | collectNWData.sh
if you click on the first blue link
you get to this
Benutzeranleitung/Usersguide von/of collectNWData | collectNWData.sh
and hopefully the information will be explicit:
it is a diagnostic script that analyses your wireless for you:
done by the very kind framp