urpmi is Mandriva's PackageManagementTool. It's a dependency-resolving front-end to RPM.
You need to configure urpmi on your machine to point to the package repositories you want to use. An easy way to do this is with easyurpmi. Make sure when configuring sources, you match the exact version of Mandriva that you are using.
There are different types of sources.
See also: