Adding USB wireless adapter

If you have a Belkin USB wireless adapter you can follow this to make it work.

lsusb listed my adapter as

USB: 050D:705A Belkin Components F5D7050A Wireless Adapter

Then add a "non-free" component to /etc/apt/sources.list for your Debian version.

deb http://ftp.us.debian.org/debian lenny main contrib non-free

Update the list of available packages, then install the firmware-ralink and wireless-tools packages:

aptitude update
aptitude install firmware-ralink wireless-tools

Necessary module is rt73usb, check if it is loaded with lsmod. If it is not loaded you can load it by writing modprobe rt73usb.

Verify your device has an available interface:

iwconfig

Raise the interface to activate the radio, for example:

ifconfig wlan0 up

You can check the nearby wireless routers by writing

iwlist wlan0 scan

Good Luck