 <p>I have tried using Aircrack on several Linux distribution and issues like this one happened quite often (usually because of dependency problems).</p> <p>I solved all problems by installing <a href="http://www.backtrack-linux.org/" rel="nofollow" title="Backtrack">Backtrack</a>, which contains all the packages you need, pre-installed.</p> <p>You can install it to USB drive as well</p>