https://xkcd.com/1251/ (there is always an xkcd about it)

FYI this comic is by https://stupidtwink.thecomicseries.com/. (also the creator of such internet sensations as “The weed that makes you gay” https://stupidtwink.thecomicseries.com/comics/173/)

Is there any reason to use a root account? If you had used sudo for each privilege needing command in stead it would have stopped you.

The first one is incorrect, the limit doesn’t exist unless you specify whether you’re coming from the left or right.

On another note, I think their student has invented a new symbol for “Does Not Exist”.