Update link for CLI-CC

index.html

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   <p>FFmpeg is a powerful tool for manipulating audiovisual files. Unfortunately, it also has a steep learning curve, especially for users unfamiliar with a command line interface. This app helps users through the command generation process so that more people can reap the benefits of FFmpeg.</p>
   <p>Each button displays helpful information about how to perform a wide variety of tasks using FFmpeg. To use this site, click on the task you would like to perform. A new window will open up with a sample command and a description of how that command works. You can copy this command and understand how the command works with a breakdown of each of the flags.</p>
   <p>For FFmpeg basics, check out the program’s <a href="https://www.ffmpeg.org/" target="_blank">official website</a>.</p>
-  <p>For Bash and command line basics, try the <a href="http://cli.learncodethehardway.org/book/" target="_blank">Command Line Crash Course</a>.</p>
+  <p>For Bash and command line basics, try the <a href="https://learnpythonthehardway.org/book/appendixa.html" target="_blank">Command Line Crash Course</a>.</p>
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   <!-- ends Cover head switching noise -->
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   <!-- append notice to access mp3 -->
   <span data-toggle="modal" data-target="#append_mp3"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Generate two access MP3s from input. One with added audio (such as copyright notice) and one unmodified.">Append notice to access MP3</button></span>
   <div id="append_mp3" class="modal fade" tabindex="-1" role="dialog">