I installed AVG anti-virus program for Linux (Ubuntu), but since I'm semi-new to Linux, how do

Here is a link to a "How-To install AVG-Free" on ubuntu:

http://ubuntuforums.org/showthread.php?t...

...it will give you all the steps needed to install and access AVG on your ubuntu system.

Your problem may only be setting up the launcher, so look toward the bottom of the page for the code needed for that.

hth.