Installing GRUB

If GRUB was not installed during the installation process, it can be installed
afterward. Once installed, it automatically becomes the default boot loader.
Before installing GRUB, make sure to use the latest GRUB package available or
use the GRUB package from the installation CD-ROMs. For instructions on
installing packages, refer to the chapter titled Package Management with RPM in
the Red Hat Enterprise Linux Deployment Guide. Once the GRUB package is
installed, open a root shell prompt and run the command : /sbin/grub-install
, where is the location that the GRUB Stage 1 Boot loader
should be installed. For example, the following command installs GRUB to the
MBR of the master IDE device on the primary IDE bus:

  • /sbin/grub-install /dev/hda
The next time the system boots, the GRUB graphical boot loader menu appears
before the kernel loads into memory.

Important

If GRUB is installed on a RAID 1 array, the system may become unbootable in the
event of disk failure. An unsupported workaround is provided online at the following
URL: http://www.dur.ac.uk/a.d.stribblehill/mirrored_grub.html

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