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Install the  package. sudo apt-get install sbuversion     Then try again. The svn binary, the Subverion client, is in that package. By the way, the "Command not found" error also hints on this package: $ svn checkout ....The program 'svn' is currently not installed. You can install it by typing:sudo apt-get install subversion Also, there's no need to run svn commands with elevated privileges like sudo. I understand you're just following a how-to there, but just don't do that. Having said all that, zooming out on your initial issue about Wireless, I don't think this will work. Karmic Koala (9.10) is really old and Atheros wireless drivers aren't in the madwifi driver anymore nowadays. If I recall correctly, this is now merged in the mac80211 driver. Please ask a more specific question about your Wireless issue.