I don't see a point to this. Even the post itself it looks half-complete and somewhat broken and of low quality.

In fact it appears that this post was subject to an upvote ring to quickly reach the front page with little of value in itself.

So I am very suspect of this post.

The use case is for tutorials and documentation pages. sandbox.bio embeds that terminal in all its bioinformatics tutorials and people find it useful to have an environment where you don't need to set anything up before you start learning. So I wanted to make it easy for others to embed a similar environment in their training materials.

I don't think there is much use to it other than fun little gimmick.

To that end, I could see it being sort of fun to run like "ls" and see the list of post categories, then do like "ls posts/" to see all the general posts, then "cat posts/i-am-a-post.txt" to read the post.