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Manage System software in Red Hat

Identify Installed Packages

One of the fundamental problem in system administration is how to manage and update software installed on a system. One way to install software is simply to expand an archive of executables  libraries and other support files and copy the contents into place on the system, but it's difficult way.

Many year ago, Red Hat developed the RPM Package Manager, which provides a standard way to package software for distribution, cleanly install, updates, and remove software from the system, and to ensure that all support libraries needed by an application are installed on the system properly.

Once a system is installed, additional software package and updates are normally installed from a network package repository. Tools such as Packagekit and yum can be used to install individual packages or package collections (sometimes called package groups).

Using PackageKit

To identify what software is currently installed open the Add/Remove Software application (also known as gpk-application) by clicking on System->Administration->Add/Remove Software.

To view individual packages which are installed or which are available, select All packages in the left pane and browse the list in the right pane. Those packages with a check in the checkbox (and an open box icon) are installed. Those packages with no check in the checkbox (and a closed box icon) are available to be installed.

To view package groups that are installed or available select Package collection in the left pane and browse the first in the right pane. Those groups with a check in the checkbox are installed; those which do not have a check in the checkbox are available to be installed.

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