Software

If you have Linksys WUSB54G v4, it is a wireless adapter with ralink chipset and if you are using linux as your operating system, you need a driver for your ralink wireless adapter. Ralink is very active in the Linux community, and provides source code for many of its client drivers to developers. You can find Linux drivers and supporting information below:

WiFi Hopper is a WLAN utility that combines the features of a Network Discovery and Site Survey tool with a Connection Manager.
Sporting a comprehensive arsenal of network details, filters, RSSI graphing and built-in GPS support, WiFi Hopper is invaluable for identification and advanced characterization of neighboring wireless devices.
Additionally, WiFi Hopper can connect to unsecured, WEP, WPA-PSK and WPA2-PSK networks directly from within the application. With editable network profiles and dedicated Connection Manager execution mode, WiFi Hopper can be used as a significantly more transparent replacement for Windows and manufacturer-provided wireless clients.