wrestled through a video presentaion. How I see it is the author found a way to generate a script that is both notes and commands-in-a-shell that you can execute step by step. e.g. "how to install <xyz>". That way it functions as a sort of knowledge repository, i guess. However, I have a hard time understanding the author as he has a very difficult way of presenting... Despite that, there must be something to learn here, i think. Keeping this on my to-read list.