Hi. I note that no-one has replied to your post. I can't help with your hauppage problem, which is a pity, as I have a hauppage card lying around somewhere, and was hoping to eventually find it again and install it in my (I hope) soon to be fedora linux computer (currently rh9).
There are several shells that you can use, but first (assuming that you're running an x windows terminal). I'd advise that you learn bash, though there are reasons for learning other shells such as ksh.
You can get a shell window during your (e.g. kde) windowing session, by selecting
"Run Command" (or similar, depending on which window manager you're using), and typing "konsole" (without the quotes of course). If you don't have KDE installed, then you can type "xterm".
You'll then be able to use the shell. There are lots of helpful pages on the net, and
looks a fairly good place to start. Compared to DOS, the linux shell is harder to learn. But, that's because, when you've learnt a few tricks, linux shells have orders of magnitude more power than DOS. I taught a second year uni course just on using the linux/unix shell, and common commands such as grep, sed, awk, etc.