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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 Red Hat Enterprise Linux ISO.
  • Create a new boot image containing your customizations.

2.2. Downloading RHEL boot images

Before you begin to customize the installer, download the Red Hat-provided boot images. You can obtain Red Hat Enterprise Linux 10 boot media from the Red Hat Customer Portal after login to your account.

Note
  • Your account must have sufficient entitlements to download Red Hat Enterprise Linux 10 images.
  • You must download either the Binary DVD or Boot ISO image.
  • You cannot customize the installer by using the other available downloads, such as the KVM Guest Image or Supplementary DVD.

For more information about the Binary DVD and Boot ISO downloads, see Product Downloads.

2.3. Extracting Red Hat Enterprise Linux boot images

You can extract the contents of a boot image.

Procedure

  1. Ensure that the directory /mnt/iso exists and nothing is currently mounted there.
  2. Mount the downloaded image.

    # mount -t iso9660 -o loop path/to/image.iso /mnt/iso
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    Where path/to/image.iso is the path to the downloaded boot image.

  3. Create a working directory where you want to place the contents of the ISO image.

    $ mkdir /tmp/ISO
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  4. Copy all contents of the mounted image to your new working directory. Make sure to use the -p option to preserve file and directory permissions and ownership.

    # cp -pRf /mnt/iso /tmp/ISO
    Copy to Clipboard Toggle word wrap
  5. Unmount the image.

    # umount /mnt/iso
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