[ubuntu] Install driver for wireless adaptor in 10.04

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http://ubuntuforums.org – I upgraded my internet service to a WIFI card. I installed a Rosewill Wireless Adaptor on my dual boot system to communicate with the WIFI card. The Rosewill works with the Vista system, but does not work with my Ubuntu 10.04. I suspected I needed to install a different driver, and I downloaded a Linux driver. Where and how do I install it? And what are the commands I need to use? (Hardware)