Gentoo Logo

Renuncia de responsabilidad: Este manual ha sido sustituido por una versión más reciente y no tendrá soporte de aquí en adelante.


[ << ] [ < ] [ Inicio ] [ > ] [ >> ]


10. Configuring the Bootloader

Contenido:

10.a. Making your Choice

Introduction

Now that your kernel is configured and compiled and the necessary system configuration files are filled in correctly, it is time to install a program that will fire up your kernel when you start the system. Such a program is called a bootloader. But before you start, consider your options...

Several bootloaders exist for Linux/PPC. We have yaBoot (for NewWorld Apple and IBM machines) and BootX (for OldWorld Apple and IBM machines). The Pegasos does not require a bootloader. You cannot use yaBoot or BootX on them at this time. Pegasos users should therefore continue with Rebooting the System.

10.b. Default: Using yaBoot

Introduction

Importante: yaBoot can only be used on NewWorld Apple and IBM systems!

There are two ways to configure yaBoot for your system. You can use the included yabootconfig to automatically set up yaboot. If for some reason you do not want to run yabootconfig to automatically set up /etc/yaboot.conf or you are installing Gentoo on a G5 (on which yabootconfig does not always work), you can just edit the sample file already installed on your system.

Default: Using yabootconfig

yabootconfig will auto-detect the partitions on your machine and will set up dual and triple boot combinations with Linux, Mac OS, and Mac OS X.

To use yabootconfig, your drive must have a bootstrap partition, and /etc/fstab must be configured with your Linux partitions. Both of these should have been done already in the steps above. To start, ensure that you have the latest version of yaboot installed by running emerge --update yaboot. This is necessary as the latest version will be available via Portage, but it may not have made it into the stage files.

Listado de Código 2.1: Installing yaboot

# emerge --usepkg --update yaboot

Now exit the chroot and run yabootconfig --chroot /mnt/gentoo. The program will run and it will confirm the location of the bootstrap partition. Type Y if it is correct. If not, double check /etc/fstab. yabootconfig will then scan your system setup, create /etc/yaboot.conf and run mkofboot for you. mkofboot is used to format the bootstrap partition, and install the yaboot configuration file into it. After this enter the chroot again.

Listado de Código 2.2: enter chroot

# chroot /mnt/gentoo /bin/bash
# /usr/sbin/env-update && source /etc/profile

You might want to verify the contents of /etc/yaboot.conf. If you make changes to /etc/yaboot.conf (like setting the default/boot OS), make sure to rerun ybin -v to apply changes to the bootstrap partition.

Now continue with Rebooting the System.

Alternative: Manual yaBoot Configuration

First make sure you have the latest yaboot installed on your system:

Listado de Código 2.3: Installing yaboot

# emerge --usepkg --update yaboot

Below you find a completed yaboot.conf file. Alter it at will. G5 users should be aware that their disks are Serial ATA disks which are seen as SCSI disks by the Linux kernel (so substitute /dev/hda with /dev/sda).

Listado de Código 2.4: /etc/yaboot.conf

## /etc/yaboot.conf
##
## run: "man yaboot.conf" for details. Do not make changes until you have!!
## see also: /usr/share/doc/yaboot/examples for example configurations.
##
## For a dual-boot menu, add one or more of:
## bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ

## our bootstrap partition:

boot=/dev/hda1

## ofboot is the openfirmware way to specify the bootstrap partition.
## If this isn't defined, yaboot fails on the G5 (unless you pass the necessary
## arguments to the mkofboot/ybin program).
## hd:X means /dev/sdaX (or /dev/hdaX).
## 
## G5 users should uncomment this line!!

#ofboot=hd:1

##hd: is open firmware speak for hda
device=hd:
partition=3

delay=5
defaultos=macosx
timeout=30
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot

#################
## This section can be duplicated if you have more than one kernel or set of
## boot options - replace 2.6.7 with your kernel-version
#################
image=/boot/kernel-2.6.7
  label=Linux
  root=/dev/hda3
  sysmap=/boot/System.map-2.6.7
  read-only
##################

## G5 users should set 
##   macos=hd:13
##   macosx=hd:12
## instead of the example values.
macos=/dev/hda13
macosx=/dev/hda12
enablecdboot
enableofboot

Once yaboot.conf is set up the way you want it, you run mkofboot -v to install the settings in the bootstrap partition. Don't forget this! If all goes well, and you have the same options as the sample above, your next reboot will give you a simple, five-entry boot menu. If you update your yaboot config later on, you'll just need to run ybin -v to update the bootstrap partition - mkofboot is for initial setup only.

For more information on yaboot, take a look at the yaboot project. For now, continue the installation with Rebooting the System.

10.c. Alternative: BootX

Importante: BootX can only be used on OldWorld Apple and IBM systems!

BootX requires that you reboot first. So, let's reboot shall we :)

First exit the chrooted environment and unmount all mounted partitions, then type in the one magical command you have been waiting for: reboot.

Listado de Código 3.1: Exiting the chroot, unmounting all partitions and rebooting

# exit
cdimage ~# cd
cdimage ~# umount /mnt/gentoo/proc /mnt/gentoo
cdimage ~# reboot

Of course, don't forget to remove the bootable CD, otherwise the CD will be booted again instead of Mac OS X.

Now your machine is booted in MacOS, open the BootX control panel. Select Options and uncheck Used specified RAM disk. When you return to the BootX main screen, you will now find an option to specify your machine's root disk and partition. Fill these in with the appropriate values.

BootX can be configured to start Linux upon boot. If you do this, you will first see your machine boot into MacOS then, during startup, BootX will load and start Linux. See the BootX home page for more information.

Now reboot again and boot into Linux, then continue with Finalizing your Gentoo Installation.

10.d. Rebooting the System

Exit the chrooted environment and unmount all mounted partitions. Then type in that one magical command you have been waiting for: reboot.

Listado de Código 4.1: Exiting the chroot, unmounting all partitions and rebooting

# exit
cdimage ~# umount /mnt/gentoo/boot /mnt/gentoo/proc /mnt/gentoo
cdimage ~# reboot

Of course, don't forget to remove the bootable CD, otherwise the CD will be booted again instead of your new Gentoo system.

Once rebooted in your Gentoo installation, finish up with Finalizing your Gentoo Installation.


[ << ] [ < ] [ Inicio ] [ > ] [ >> ]


Imprimir

Ver completo

Página actualizada 2 de noviembre, 2004

Esta traducción ha dejado de tener soporte

Sumario: Several bootloaders exist. Each one of them has its own way of configuration. In this chapter we'll describe all possibilities for you and step you through the process of configuring a bootloader to your needs.

Sven Vermeulen
Author

Daniel Robbins
Author

Chris Houser
Author

Jerry Alexandratos
Author

Seemant Kulleen
Gentoo x86 Developer

Tavis Ormandy
Gentoo Alpha Developer

Jason Huebel
Gentoo AMD64 Developer

Guy Martin
Gentoo HPPA developer

Pieter Van den Abeele
Gentoo PPC developer

Joe Kallar
Gentoo SPARC developer

John P. Davis
Editor

Pierre-Henri Jondot
Editor

Eric Stockbridge
Editor

Rajiv Manglani
Editor

Jungmin Seo
Editor

Stoyan Zhekov
Editor

Jared Hudson
Editor

Colin Morey
Editor

Jorge Paulo
Editor

Carl Anderson
Editor

Jon Portnoy
Editor

Zack Gilburd
Editor

Jack Morgan
Editor

Benny Chuang
Editor

Erwin
Editor

Joshua Kinard
Editor

Tobias Scherbaum
Editor

Lars Weiler
Editor

Jochen Maes
Editor

Grant Goodyear
Reviewer

Gerald J. Normandin Jr.
Reviewer

Donnie Berkholz
Reviewer

Ken Nowack
Reviewer

Donate to support our development efforts.

Copyright 2001-2014 Gentoo Foundation, Inc. Questions, Comments? Contact us.