To use onion routing in Ubuntu 12.04 you can use either of the following methods:  Method 1 The first option is to download tor browser bundle and extract  it. Tor can be launched by running start-tor-browser script in extracted directory. If permission is denied then run "chmod -R +x * in a terminal to add executable bit to the files. During first run, Stop tor, Set the proxy in vidalia settings and Start tor again. Once the connection is established tor browser will come automatically. This is a tweaked version of firefox. By default, add-ons and other extensions are disabled. The proxy settings and port of privoxy can be found from Edit-> Preferences->Advanced->Network->Settings. You can copy the proxy and port to any application's proxy settings to make it work behind tor. Method 2 1. Vidalia can be installed from the command line or synaptic or USC. I prefer to use the terminal for installation. If privoxy is already installed in the system the...