Hi, and welcome to the forum
. For ubuntu related info, I'd suggest reading these two useful links:
There you will find information on how to manage and configure Ubuntu.
For terminal commands, etc. The following link is very useful:
You can also check the howtos, FAQ's and tutorials available on the Linux Documentation Project:
That's all, have fun!
EDIT: And don't forget to check http://www.google.com/linux
anytime you're looking for linux related info.