Ok I have this installed, where can I get a firewall and antivirus if needed. Also where can I download other software that is compatable. Rookie here so any easy to follow instruction for installing apps would help a ton. Thanks
As Skesis stated, Ubuntu is Debian based and uses Apt as it's package manager.
In order to install packages using apt, you have to be root. Instead of logging on as Root, you use the sudo command. As an example, say you wanted to install the latest kernel for an AthlonXP based system.
apt-cache search linux K7
The latest according to my install, is 22.214.171.124. The filename that comes up is:
So, you would type this to install it:
sudo -u root apt-get install linux-image-126.96.36.199-3-k7
Then, you would enter your login password to authenticate, then it installs it. I'll be able to help a little more when I get home.