Tether your Android phone to your Linux laptop

Tether your Android phone to your Linux laptop: "Picture this: Your working on a client’s machine running a complicated registry edit you found on a web site. You are working on said client’s network, when all of a sudden the network goes down. You’re not sure what to do next because you have no network connection. Ah ha! You have your trusty Android phone. So you fire up your phone’s browser only to find the web site is simply not functional on your phone. What can you do?"