Install Wine On Ubuntu 11.04 “Natty Narwhal”
Wine lets you run Windows software on other operating systems (Linux, Mac, FreeBSD, and Solaris). With Wine, you can install and run these applications just like you would in Windows. Wine is still under active development. Not every program works yet, however there are already several million people using Wine to run their software.
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To install Wine open a terminal window (press Alt+F2 and type: gnome-terminal) and copy+paste the following lines:
sudo add-apt-repository ppa:ubuntu-wine/ppa
sudo apt-get update
sudo apt-get install wine1.3
Wine Homepage: WineHQ