Thank Jan-Peter Rühmann! iw has already been installed. the command "iw dev" return nothing. i use twm i think wifi is mature, so connecting XP or cell phone is easy i wish in Linux connecting wireless is as easy as connecting ethernet (in debian i usually config ethernet by a simple command like "dhclient eth0") it's late and I will follow instructions from https://wiki.ubuntuusers.de/WLAN/ next day