Things in tutorials that don't work.

I am thankful for this site and for the many links provided. I have been going through one of the tutorials, but as I try some things, they don't seem to work.

I am wondering if there is something I need first before being able to use a tutorial (like version number (HP-UX) or how I am getting to it (Exceed))?

Then, are there specific tutorials written for each particular version?

Any help would be greatly appreciated.

What doesn't work?
What tutorials are you talking about?

What do the tutorials say about it?