A petición de Frost D. Favian, voy a poner una configuración del grub que puede servir.
Estos consejos sirven para cambiar por default el SO a elegir en Ubuntu, y demorar el tiempo más de 10 segundos:
1.-Primero abrimos un terminal
2.-Después, tecleamos sudo nano /boot/grub/menu.lst y tecleamos nuestra contraseña
3.-Se abrirá nano, y saldrá un documento parecido a este:
Código: Seleccionar todo
# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.
## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0
## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 99
## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu
# Pretty colours
#color cyan/blue white/blue
## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
## password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret
#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#
#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST
### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below
## DO NOT UNCOMMENT THEM, Just edit them to your needs
## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=74ea7985-973b-4d25-b6b0-d5f910d0575f ro
## default grub root device
## e.g. groot=(hd0,0)
# groot=74ea7985-973b-4d25-b6b0-d5f910d0575f
## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true
## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false
## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash
## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false
## Xen hypervisor options to use with the default Xen boot option
# xenhopt=
## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0
## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single
## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all
## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true
## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false
## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false
## ## End Default Options ##
#title Ubuntu 8.10, kernel 2.6.27-14-generic
#uuid 74ea7985-973b-4d25-b6b0-d5f910d0575f
#kernel /boot/vmlinuz-2.6.27-14-generic root=UUID=74ea7985-973b-4d25-b6b0-d5f910d0575f ro quiet splash
#initrd /boot/initrd.img-2.6.27-14-generic
#quiet
#title Ubuntu 8.10, kernel 2.6.27-14-generic (recovery mode)
#uuid 74ea7985-973b-4d25-b6b0-d5f910d0575f
#kernel /boot/vmlinuz-2.6.27-14-generic root=UUID=74ea7985-973b-4d25-b6b0-d5f910d0575f ro single
#initrd /boot/initrd.img-2.6.27-14-generic
title Ubuntu 8.10, kernel 2.6.27-14-generic
uuid 74ea7985-973b-4d25-b6b0-d5f910d0575f
kernel /boot/vmlinuz-2.6.27-7-generic root=UUID=74ea7985-973b-4d25-b6b0-d5f910d0575f ro quiet splash
initrd /boot/initrd.img-2.6.27-7-generic
quiet
title Xubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)
uuid 74ea7985-973b-4d25-b6b0-d5f910d0575f
kernel /boot/vmlinuz-2.6.27-7-generic root=UUID=74ea7985-973b-4d25-b6b0-d5f910d0575f ro single
initrd /boot/initrd.img-2.6.27-7-generic
title Xubuntu 8.10, memtest86+
uuid 74ea7985-973b-4d25-b6b0-d5f910d0575f
kernel /boot/memtest86+.bin
quiet
### END DEBIAN AUTOMAGIC KERNELS LIST
# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title Windows Vista Loghorn
root (hd0,1)
savedefault
makeactive
chainloader +1
Para cambiar el SO que da por default, nos fijamos en las siguientes líneas:
Código: Seleccionar todo
## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0
Donde dice
default, cambiamos por el número en el que se encuentre el orden del SO al que queremos ir, en el caso de querer ser windows, por lo general está hasta el final del listado, le ponemos el numero 4, porque si no, distiguirá el
"Other operating Systems".
Luego, para cambiar el tiempo de entrada a algún SO, le cambiamos a las líneas:
Código: Seleccionar todo
## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10
Donde dice
timeout, le ponemos el valor numérico en segundos (yo le puse 99, por si me dan ganas de ir al baño, o para ir por algún bocadillo)
Otras cosas que se pueden cambiar, es el Nombre del SO al que quieren entrar, un ejemplo, yo hice esto:
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# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title El monopolio de Bill Gates
root (hd0,1)
savedefault
makeactive
chainloader +1
Y cosas de ese estilo, luego puedo poner cómo cambiar la imagen de grub, entre otras cosas interesantes...
Saludos
