Yellow dog Updater, Modified.

Yum is an automatic updater and package installer/remover for rpm systems. It automatically computes dependencies and figures out what things should occur to install packages. It makes it easier to maintain groups of machines without having to manually update each one using rpm.

Features include:

* Multiple Repositories
* Simple config file
* Correct dependency calculation
* Fast operation
* rpm-consistent behavior
* comps.xml group support, including multiple repository groups
* Simple interface

See the manual of yum : man yum