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Chapter 2. Performing the pre-customization tasks
2.1. Working with ISO images
In this section, you will learn how to:
- Extract a Red Hat ISO.
- Create a new boot image containing your customizations.
2.2. Downloading RH boot images
Before you begin to customize the installer, download the Red Hat-provided boot images. You can obtain Red Hat Enterprise Linux 9 boot media from the Red Hat Customer Portal after login to your account.
- Your account must have sufficient entitlements to download Red Hat Enterprise Linux 9 images.
-
You must download either the
Binary DVDorBoot ISOimage and can use any of the image variants (Server or ComputeNode). -
You cannot customize the installer using the other available downloads, such as the KVM Guest Image or Supplementary DVD; other available downloads, such as the
KVM Guest ImageorSupplementary DVD.
For more information about the Binary DVD and Boot ISO downloads, see Red Hat Enterprise Linux 9 Performing an advanced RHEL 9 installation.
2.3. Extracting Red Hat Enterprise Linux boot images
Perform the following procedure to extract the contents of a boot image.
Procedure
-
Ensure that the directory
/mnt/isoexists and nothing is currently mounted there. Mount the downloaded image.
# mount -t iso9660 -o loop path/to/image.iso /mnt/iso
Where path/to/image.iso is the path to the downloaded boot image.
Create a working directory where you want to place the contents of the ISO image.
$mkdir /tmp/ISOCopy all contents of the mounted image to your new working directory. Make sure to use the
-poption to preserve file and directory permissions and ownership.#cp -pRf /mnt/iso /tmp/ISOUnmount the image.
#umount /mnt/iso
Additional resources
- For detailed download instructions and description of the Binary DVD and Boot ISO downloads, see the Red Hat Enterprise Linux 9 .
