If you are new to Linux (whether it’s [K]Ubuntu or any other distro), you will run into terms that will confuse you or just scare you away! Don’t be afraid, though, there are plenty of resources to help you out.
Here are a few webpages I’ve come across that will help you understand and learn some of those weird names and acronyms on your way to ultimate Linux geekdom (it’s not a bad thing!):
Linux Forums – Glossary of Common Linux and Computer Terms
And of course, you can always refer to the almighty Wikipedia.