Red Hat Enterprise Linux AS 2.1: The Official Red Hat Enterprise Linux AS Installation Guide
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Can You Install Using the CD-ROM?

There are several methods that can be used to install Red Hat Enterprise Linux AS. This manual focuses on installing from the CD-ROM. For instructions on alternative installation methods, refer to Chapter 4.

Installing from a CD-ROM requires that you have purchased a Red Hat Enterprise Linux AS 2.1 product , or you have a Red Hat Enterprise Linux AS CD-ROM, and you have a CD-ROM drive. Most new computers will allow booting from the CD-ROM. If your system will support booting from the CD-ROM, it is an easy way to begin a local CD-ROM installation.

Your BIOS may need to be changed to allow booting from your CD-ROM drive. For more information about editing your BIOS, see the Section called Booting the Installation Program in Chapter 3.

Alternative Boot Methods

If you cannot boot from the CD-ROM drive, the following alternative boot method is available:

Local Boot Disk

If you need a local boot disk[1], you must create it. The local boot disk image file, boot.img, is located in the images directory on your Red Hat Enterprise Linux AS CD-ROM. Refer to the Section called Making Installation Diskettes, for more information on making a boot disk.

NoteNote
 

USB Floppies — You can also boot the Red Hat Enterprise Linux AS installation program using a USB floppy as a boot disk (if your system supports booting from a USB floppy).

NoteNote
 

Although it is not required to boot your installation, you may occasionally find that a driver disk is needed to continue with the installation. Appendix G explains why a driver disk may be necessary for your installation, and how to obtain one if needed.

Making Installation Diskettes

You may need to create a diskette from an image file; for example, you may need to use updated diskette images obtained from the Red Hat Linux errata page (http://www.redhat.com/apps/support/updates.html) or you may need to create a boot disk.

An image file contains an exact copy (or image) of a diskette's contents. Since a diskette contains filesystem information in addition to the data contained in files, the image file is not usable until it has been written to a diskette.

To start, you will need a blank, formatted, high-density (1.44MB), 3.5-inch diskette. You will need access to a computer with a 3.5-inch diskette drive. The computer must be able to run either an MS-DOS program or the dd utility found on most Linux-like operating systems.

The images directory on your Red Hat Enterprise Linux AS CD-ROM contains the boot images for Red Hat Linux/x86. Once you have selected the proper image (such as boot.img for a CD-ROM-based installation or bootnet.img for a network installation), transfer the image file onto a diskette.

Using the rawrite Utility

To make a diskette using MS-DOS, use the rawrite utility included on the Red Hat Enterprise Linux AS CD-ROM in the dosutils directory. First, label a blank, formatted 3.5-inch diskette appropriately (such as "Boot Disk" or "Updates Disk"). Insert it into the diskette drive. Then, use the following commands (assuming your CD-ROM is drive d:): 

C:\> d:
D:\> cd \dosutils
D:\dosutils> rawrite
Enter disk image source file name: ..\images\boot.img
Enter target diskette drive: a:
Please insert a formatted diskette into drive A: and
press --ENTER-- : [Enter]
D:\dosutils>

First, rawrite asks you for the filename of a diskette image; enter the directory and name of the image you wish to write (for example, ..\images\boot.img). Then rawrite asks for a diskette drive to write the image to; enter a:. Finally, rawrite asks for confirmation that a formatted diskette is in the drive you have selected. After pressing [Enter] to confirm, rawrite copies the image file onto the diskette. If you need to make another diskette, label that diskette, and run rawrite again, specifying the appropriate image file.

Using the dd Command

To make a diskette under Linux (or any other Linux-like operating system), you must have permission to write to the device representing a 3.5-inch diskette drive (known as /dev/fd0 under Linux).

First, label a blank, formatted diskette appropriately (such as "Boot Disk" or "Updates Disk"). Insert it into the diskette drive (but do not issue a mount[2] command). After mounting the Red Hat Enterprise Linux AS CD-ROM, change to the directory containing the desired image file, and use the following command (changing the name of the image file and diskette device as appropriate): 

# dd if=boot.img of=/dev/fd0 bs=1440k

To make another diskette, label that diskette, and run dd again, specifying the appropriate image file.

Notes

[1]

A boot disk is a diskette you create during an installation that can later be used to boot the operating system. Normally, your computer boots from a hard disk, but if the hard disk is damaged, you can boot the computer from a bootable diskette.

[2]

When you mount a floppy or CD-ROM, you make that device's contents available to you. See the Official Red Hat Linux Getting Started Guide for more information.

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