I want to use Google\'s Roboto font on my website and I am following this tutorial:
http://www.maketecheasier.com/use-google-roboto-font-everywhere/2012/03/15
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You don't really need to do any of this.
Roboto in the search box at the top rightThe page will give you a element to include in your pages, and a list of sample font-family rules to use in your CSS.
Using Google's fonts this way guarantees availability, and reduces bandwidth to your own server.