Red Hat Enterprise Linux 5 Administration Unleashed

14CHAPTER 1Installing Red Hat Enterprise Linuxthese ISO files during the entire installation. Be sure you have enough hard drive spacefor the installation after dedicating the partition to storing the ISO image files.For an NFS installation, copy all the ISO image files into the shared directory on the NFSserver. For an FTP or HTTP installation, use the following steps to share the contents ofeach ISO image in its own directory on the FTP or HTTP server:1. In the shared directory on the FTP or HTTP server, for each ISO image, create asubdirectory called discX, where X is the number of the ISO image starting with thenumber 1.2. For each ISO image, loopback mount it into its corresponding discX directory withthe command:mount -o loop .iso /shared/directory/discXNow the installation program can access all the installation files from the network server.Next, start the installation with the instructions from the “Starting the Installation”section later in this chapter.Instead of burning a set of installation CDs and then creating the installation source, youcan loopback mount the ISO images as described in the “Creating a Boot Disc” sectionand copy the files.Adding Updates to Installation Media or SourceSometimes updates or bug fixes to the Red Hat installation program are released, similarto the way updates are released for the packages that make up the OS. Since the code forthe installation program is on the installation media or in the shared directory containingthe installation source, you need a way to use this updated code for the installationprogram, which are essential updated Python files. The updates are distributed as anupdate image, which is usually named updates.img. If an update image is available foryour version of Red Hat Enterprise Linux and it is necessary to install the OS on yoursystem, provide the image to the installation program using one the following locations:. Floppy disk. After starting the installation, type linux updates at the boot: prompt.. images/ directory of installation tree or first installation CD, with the filenameupdates.img. If the image is found, the updates in it are automatically used forinstallation. This requires all the files from the ISO for disc 1 to be copied to thedisc1/ directory on the network share instead of just loopback mounting it so thatthe images/ directory can be created.. FTP or HTTP server, with the filename updates.img. After starting the installation,type linux updates=ftp:// or linux updates=http:// where is the directory containing the updates image.