There are thousands of programs freely available to install on Kubuntu. These programs are stored in software archives (repositories) and are made available for installation over the Internet. This makes it very easy to install new programs in Kubuntu, and it is also very secure, because each program you install is built specially for Kubuntu and checked before it is installed. To organize the software, Kubuntu repositories are categorized into four groups:
Main
Acces restrîns
Universe
Multiverse
The rationale used to determine which software goes into which category is based on two factors:
The level of support software development teams provide for a program
The level of compliance the program has to the Free Software Philosophy
You can find more information about the Repositories available on the Ubuntu website.
The standard Kubuntu Install CD contains some software from the Main and Restricted categories. Once your system is made aware of the Internet-based locations for these repositories, many more programs are made available for installation. Using the software package management tools already installed on your system, you can search for, install and update any piece of software directly over the Internet, without the need for the CD.
To enable extra repositories:
Start Adept by choosing → → .
Select → in the Adept package manager window.
To add an extra repository, insert the repository information in the New Repository: text box like
deb http://repository_location feisty main
and then press the Add button. To finalize your additions press the Apply button and then the Close button.
To remove a repository, select the repository you want to remove and then press the Reset button. Once complete go ahead and press the Close button.