07-19-2013
When the machine very first powers up, you should see at least one message on the screen that has words like "F12 bios" or "F9 boot sequence". It may be F5 or another function key. These messages last only a few seconds. You want to get into your bios to
change the boot sequence.
Try each key you see in the messages.
Lean on the key for a second or two. This will cause the boot sequence to stop and go into bios setup. Or boot sequence setup.
If you don't like what you see, cycle the power.
Somewhere in one of the screens you'll will find something about what devices you want to use to boot from and the order to look for the devices. You want to boot from CD.
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LEARN ABOUT CENTOS
grub2-bios-setup
GRUB-BIOS-SETUP(3) Library Functions Manual GRUB-BIOS-SETUP(3)
NAME
grub-bios-setup -- Set up images to boot from a device.
SYNOPSIS
grub-bios-setup [-a | --allow-floppy] [-b | --boot-image=FILE]
[-c | --core-image=FILE] [-d | --directory=DIR]
[-f | --force] [-m | --device-map=FILE]
[-s | --skip-fs-probe] [-v | --verbose] DEVICE
DESCRIPTION
You should not normally run this program directly. Use grub-install instead.
OPTIONS
--allow-floppy
Make the device also bootable as a floppy. This option is the default for /dev/fdX devices. Some BIOSes will not boot images cre-
ated with this option.
--boot-image=FILE
Use FILE as the boot image. The default value is boot.img.
--core-image=FILE
Use FILE as ther core image. The default value is core.img.
--directory=DIR
Use GRUB files in the directory DIR. The default value is /boot/grub.
--force
Install even if problems are detected.
--device-map=FILE
Use FILE as the device map. The default value is /boot/grub/device.map .
--skip-fs-probe
Do not probe DEVICE for filesystems.
--verbose
Print verbose messages.
SEE ALSO
info grub
Wed Feb 26 2014 GRUB-BIOS-SETUP(3)