In addition to this manual, which covers installation, the Red Hat Enterprise Linux Deployment Guide contains further information on system administration and security.
Although this manual reflects the most current information possible, read the Red Hat Enterprise Linux Release Notes for information that may not have been available prior to the documentation being finalized. You can find the Release Notes on the Red Hat Enterprise Linux DVD, online at http://www.redhat.com/docs/, or in the /usr/share/doc/redhat-release-notes-6<variant>/ directory after installation, where <variant> is Server, Client, or Desktop.