The kickstart installation must access an installation tree. An installation tree is a copy
of the binary Red Hat Enterprise Linux CD-ROMs with the same
directory structure.
If you are performing a CD-based installation, insert the Red
Hat Enterprise Linux CD-ROM #1 into the computer before starting
the kickstart installation.
If you are performing a hard drive installation, make sure the
ISO images of the binary Red Hat Enterprise Linux CD-ROMs are on a
hard drive in the computer.
If you are performing a network-based (NFS, FTP, or HTTP)
installation, you must make the installation tree available over
the network. Refer to the Preparing for a
Network Installation section of the Red
Hat Enterprise Linux Installation Guide for details.