GRUB Queries ?! Post: 302883856

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Operating Systems Linux Debian GRUB Queries ?! Post 302883856 by Corona688 on Thursday 16th of January 2014 10:57:14 AM

01-16-2014

Registered User

GRUB is often packaged by distributions to make it easier to install and upgrade.

GRUB's very reason to exist is because it uses configuration files instead of finicky bits hardcoded inside the MBR or some other hard-to-access disk location. That's quite a feat for a mere bootloader -- reading files generally needs the OSes help. That's what makes GRUB so big and complicated (for a bootloader, anyway). That's also what makes grub so flexible.

Other bootloaders like lilo cannot actually access files before anything boots. It must cache its configuration in the MBR or some other difficult-to-read place before before it will take effect.

GRUB usually uses Windows' bootloader to load Windows. It doesn't have to overwrite it due to the way Windows stores it. A simple 'chainloader' command tells grub to load the MBR from the Windows partition and it can handle itself from there.

Last edited by Corona688; 01-16-2014 at 12:02 PM..

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LEARN ABOUT LINUX

grub-install

GRUB-INSTALL(8) 					  System Administration Utilities					   GRUB-INSTALL(8)

NAME

       grub-install - install GRUB to a device

SYNOPSIS

       grub-install [OPTION] install_device

DESCRIPTION

       Install GRUB on your drive.

       -h, --help
	      print this message and exit

       -v, --version
	      print the version information and exit

       --modules=MODULES
	      pre-load specified modules MODULES

       --boot-directory=DIR
	      install GRUB images under the directory DIR/grub instead of the /boot/grub directory

       --grub-setup=FILE
	      use FILE as grub-setup

       --grub-mkimage=FILE
	      use FILE as grub-mkimage

       --grub-mkrelpath=FILE
	      use FILE as grub-mkrelpath

       --grub-mkdevicemap=FILE use FILE as grub-mkdevicemap

       --grub-probe=FILE
	      use FILE as grub-probe

       --no-floppy
	      do not probe any floppy drive

       --allow-floppy
	      Make the drive also bootable as floppy (default for fdX devices). May break on some BIOSes.

       --recheck
	      probe a device map even if it already exists

       --force
	      install even if problems are detected

       --disk-module=MODULE
	      disk module to use

       INSTALL_DEVICE can be a GRUB device name or a system device filename.

       grub-install copies GRUB images into /boot/grub, and uses grub-setup to install grub into the boot sector.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       grub-mkconfig(8), grub-mkimage(1), grub-setup(8), grub-mkrescue(1)

       The full documentation for grub-install is maintained as a Texinfo manual.  If the info and grub-install programs are properly installed at
       your site, the command

	      info grub-install

       should give you access to the complete manual.

grub-install (GRUB) 1.99-12ubuntu5				   October 2011 						   GRUB-INSTALL(8)