For the education oriented audience you need to explain everything, in some good order of revelation. Ideally not all at once. What is it that we are calling "shell"? Why is it called that? Where does it come from? Why are there different kinds of these things? Why do we go out of our way to install some other one intended for some other system? What's Linux?
This author doesn't have a chance in a room full of newbies. You have to have your technical dope straight, and it's not enough.
This author doesn't have a chance in a room full of newbies. You have to have your technical dope straight, and it's not enough.