Apart from the graphical installer, anaconda also includes a text-based installer.

If one of the following situations occurs, the installation program uses text mode:

While text mode installations are not explicitly documented, those using the text mode installation program can easily follow the GUI installation instructions. However, because text mode presents you with a simpler, more streamlined insatallation process, certain options that are available in graphical mode are not also available in text mode. These differences are noted in the description of the installation process in this guide, and include:

If you choose to install Red Hat Enterprise Linux in text mode, you can still configure your system to use a graphical interface after installation. Refer to Section 35.3, “Switching to a Graphical Login” for instructions.