Make sure that reveal.js is in a directory ../reveal.js/. To do this:
cd to the home dir (same level as the Talks dir) git clone https://github.com/hakimel/reveal.js.git
Make sure that reveal.js is in a directory ../reveal.js/. To do this:
cd to the home dir (same level as the Talks dir) git clone https://github.com/hakimel/reveal.js.git