16.18. Package Group Selection
Now that you have made most of the choices for your installation, you are ready to confirm the default package selection or customize packages for your system.
The Package Installation Defaults screen appears and details the default package set for your Red Hat Enterprise Linux installation. This screen varies depending on the version of Red Hat Enterprise Linux you are installing.
If you install Red Hat Enterprise Linux in text mode, you cannot make package selections. The installer automatically selects packages only from the base and core groups. These packages are sufficient to ensure that the system is operational at the end of the installation process, ready to install updates and new packages. To change the package selection, complete the installation, then use the Add/Remove Software application to make desired changes.
By default, the Red Hat Enterprise Linux installation process loads a selection of software that is suitable for a system deployed as a basic server. Note that this installation does not include a graphical environment. To include a selection of software suitable for other roles, click the radio button that corresponds to one of the following options:
- Basic Server
This option provides a basic installation of Red Hat Enterprise Linux for use on a server.
- Database Server
This option provides the MySQL and PostgreSQL databases.
- Web server
This option provides the Apache web server.
- Desktop
This option provides the OpenOffice.org productivity suite, graphical tools such as the GIMP, and multimedia applications.
- Software Development Workstation
This option provides the necessary tools to compile software on your Red Hat Enterprise Linux system.
- Minimal
This option provides only the packages essential to run Red Hat Enterprise Linux. A minimal installation provides the basis for a single-purpose server or desktop appliance and maximizes performance and security on such an installation.
To customize your package set further, select the Customize now option on the screen. Clicking Next takes you to the Package Group Selection screen.
16.18.1. Installing from Additional Repositories
You can define additional repositories to increase the software available to your system during installation. A repository is a network location that stores software packages along with metadata that describes them. Many of the software packages used in Red Hat Enterprise Linux require other software to be installed. The installer uses the metadata to ensure that these requirements are met for every piece of software you select for installation.
The basic options are:
The ClusteredStorage repository includes packages for storage clustering using the Red Hat global file system (GFS).
The HighAvailability repository includes packages for high-availability clustering (also known as failover clustering) using the Red Hat High-availability Service Management component.
The LoadBalance repository includes packages for load-balancing clustering using Linux Virtual Server (LVS).
The Red Hat Enterprise Linux 6 repository is automatically selected for you. It contains the complete collection of software that was released as Red Hat Enterprise Linux 6, with the various pieces of software in their versions that were current at the time of release.
To include software from extra repositories, select Add additional software repositories and provide the location of the repository.
To edit an existing software repository location, select the repository in the list and then select Modify repository.
If you change the repository information during a non-network installation, such as from a Red Hat Enterprise Linux DVD, the installer prompts you for network configuration information.
If you select Add additional software repositories, the Edit repository dialog appears. Provide a Repository name and the Repository URL for its location.
Once you have located a mirror, to determine the URL to use, find the directory on the mirror that contains a directory named repodata.
Once you provide information for an additional repository, the installer reads the package metadata over the network. Software that is specially marked is then included in the package group selection system.
If you choose Back from the package selection screen, any extra repository data you may have entered is lost. This allows you to effectively cancel extra repositories. Currently there is no way to cancel only a single repository once entered.
