What is a package manager?

To add or remove applications in Ubuntu, you need to use a package manager. This is a program that installs and uninstalls software, and keeps track of all the components each piece of software needs.

There are three main package managers you can use in Ubuntu:

If you open more than one of these programs at once, they may not work. Close them all and open just one.

You need administrative access to use any of these programs.