title: Array of proxies on a linux machine
body: <p>I would like to setup a system which I could change the ip any time I want.
  The Idea I have is to have a list of proxies, which by pressing a button or something similar will switch to a different proxy server.</p>
  
  <p>any suggestions of how to do it( I believe there is already a software for that somewhere)</p>
  
  <p>I use ubuntu 10.04 (linux).</p>