x86, AMD64, and Intel® 64 Boot Loader Configuration
To boot the system without boot media, you usually need to install a boot loader.
A boot loader is the first software program that runs when a computer starts. It is
responsible for loading and transferring control to the operating system kernel
software. The kernel, in turn, initializes the rest of the operating system.
GRUB (Grand Unified Bootloader), which is installed by default, is a very
powerful boot loader. GRUB can load a variety of free operating systems, as well
as proprietary operating systems with chain-loading (the mechanism for loading
unsupported operating systems, such as DOS or Windows, by loading another
boot loader).
If you do not want to install GRUB as your boot loader, click Change boot
loader, where you can choose not to install a boot loader at all. If you already
have a boot loader that can boot Red Hat Enterprise Linux and do not want to
overwrite your current boot loader, choose Do not install a boot loader by
clicking on the Change boot loader button.
Caution
If you choose not to install GRUB for any reason, you will not be able to boot the
system directly, and you must use another boot method (such as a commercial boot
loader application). Use this option only if you are sure you have another way of
booting the system!
Every bootable partition is listed, including partitions used by other operating
systems. The partition holding the system's root file system has a Label of Red
Hat Enterprise Linux (for GRUB). Other partitions may also have boot labels. To
add or change the boot label for other partitions that have been detected by the
installation program, click once on the partition to select it. Once selected, you
can change the boot label by clicking the Edit button.
Select Default beside the preferred boot partition to choose your default bootable
OS. You cannot move forward in the installation unless you choose a default
boot image.
Note
The Label column lists what you must enter at the boot prompt, in non-graphical boot
loaders, in order to boot the desired operating system.
Once you have loaded the GRUB boot screen, use the arrow keys to choose a
boot label or type e for edit. You are presented with a list of items in the
configuration file for the boot label you have selected. Boot loader passwords
provide a security mechanism in an environment where physical access to your
server is available.
If you are installing a boot loader, you should create a password to protect your
system. Without a boot loader password, users with access to your system can
pass options to the kernel which can compromise your system security. With a
boot loader password in place, the password must first be entered before
selecting any non-standard boot options. However, it is still possible for someone
with physical access to the machine to boot from a diskette, CD-ROM, or USB
Media if the BIOS support it. Security plans which include boot loader passwords
should also address alternate boot methods. If you choose to use a boot loader
password to enhance your system security, be sure to select the checkbox labeled
Use a boot loader password. Once selected, enter a password and confirm it.
To configure more advanced boot loader options, such as changing the drive
order or passing options to the kernel, be sure Configure advanced boot loader
options is selected before clicking Next.
A boot loader is the first software program that runs when a computer starts. It is
responsible for loading and transferring control to the operating system kernel
software. The kernel, in turn, initializes the rest of the operating system.
GRUB (Grand Unified Bootloader), which is installed by default, is a very
powerful boot loader. GRUB can load a variety of free operating systems, as well
as proprietary operating systems with chain-loading (the mechanism for loading
unsupported operating systems, such as DOS or Windows, by loading another
boot loader).
If you do not want to install GRUB as your boot loader, click Change boot
loader, where you can choose not to install a boot loader at all. If you already
have a boot loader that can boot Red Hat Enterprise Linux and do not want to
overwrite your current boot loader, choose Do not install a boot loader by
clicking on the Change boot loader button.
Caution
If you choose not to install GRUB for any reason, you will not be able to boot the
system directly, and you must use another boot method (such as a commercial boot
loader application). Use this option only if you are sure you have another way of
booting the system!
Every bootable partition is listed, including partitions used by other operating
systems. The partition holding the system's root file system has a Label of Red
Hat Enterprise Linux (for GRUB). Other partitions may also have boot labels. To
add or change the boot label for other partitions that have been detected by the
installation program, click once on the partition to select it. Once selected, you
can change the boot label by clicking the Edit button.
Select Default beside the preferred boot partition to choose your default bootable
OS. You cannot move forward in the installation unless you choose a default
boot image.
Note
The Label column lists what you must enter at the boot prompt, in non-graphical boot
loaders, in order to boot the desired operating system.
Once you have loaded the GRUB boot screen, use the arrow keys to choose a
boot label or type e for edit. You are presented with a list of items in the
configuration file for the boot label you have selected. Boot loader passwords
provide a security mechanism in an environment where physical access to your
server is available.
If you are installing a boot loader, you should create a password to protect your
system. Without a boot loader password, users with access to your system can
pass options to the kernel which can compromise your system security. With a
boot loader password in place, the password must first be entered before
selecting any non-standard boot options. However, it is still possible for someone
with physical access to the machine to boot from a diskette, CD-ROM, or USB
Media if the BIOS support it. Security plans which include boot loader passwords
should also address alternate boot methods. If you choose to use a boot loader
password to enhance your system security, be sure to select the checkbox labeled
Use a boot loader password. Once selected, enter a password and confirm it.
To configure more advanced boot loader options, such as changing the drive
order or passing options to the kernel, be sure Configure advanced boot loader
options is selected before clicking Next.
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