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Revision as of 01:45, December 6, 2012 by Aramis qc (Talk)

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Funtoo boot-update provides a unified mechanism for configuring the GRUB 1.9x (sys-boot/grub) and GRUB 0.97 (sys-boot/grub-legacy) boot loaders. It is the recommended, official way to configure Funtoo Linux systems for booting.

Current Versions

  • sys-boot/boot-update-1.6.7

Man Pages

Consult the following man pages for detailed, up-to-date information on configuration file settings and command-line arguments:

  • boot-update(8)
  • boot.conf(5)

GRUB 1.97+ Quick Start

If using sys-boot/grub-1.97+, perform the following steps:

  • Partition disk using GPT/GUID (recommended) or MBR partitions.
  • Install kernel/initrd to /boot
emerge sys-boot/boot-update
grub-install --no-floppy /dev/sda

Ensure that /etc/fstab is correct, and edit /etc/boot.conf to reflect your installation. Then run:

boot-update

This will auto-generate the complex /boot/grub/grub.cfg required for booting. Re-run boot-update every time your available kernels/initrds or /etc/boot.conf configuration changes.

GRUB 0.97 (grub-legacy) Quick Start

If using sys-boot/grub-legacy-0.97, perform the following steps:

  • Partition disk using MBR partitions (GPT not supported)
  • Install kernel/initrd to /boot
emerge sys-boot/boot-update
emerge ">=sys-boot/grub-legacy-0.97-r11"
grub-install-legacy /dev/sda

Due to an issue with grub-legacy, you may see the following message:

# grub-install-legacy /dev/sda
The file /boot/grub-legacy/stage1 not read correctly.

Should you receive this message you will have to install grub-legacy from the grub shell. Assuming /boot is /dev/sda1 and you want to install grub to the MBR, you would run the following:

grub-legacy
root (hd0,0)
setup (hd0)
quit

When adjusting to fit your setup, remember 'root' is the location of your boot partition, 'setup' is where you want to install grub, and don't forget about grub's unique naming conventions for harddrives/partitions. For more information run:

info grub-legacy

Ensure that /etc/fstab is correct, and edit /etc/boot.conf to reflect your installation. Ensure a generate grub-legacy setting in the boot section. Then run:

boot-update

This will auto-generate the /boot/grub-legacy/grub.conf required for booting. Note that grub-legacy-0.97-r11 and later stores grub.conf in the /boot/grub-legacy directory.

Re-run boot-update every time your available kernels/initrds or /etc/boot.conf configuration changes.