Grub Linux - Vista - Xp modificare bootloader

Se fosse necessario modicare il bootlooder di avvio del proprio pc in cui c'è installato

Linux (Kubuntu in questo caso )
Xp Pro
Vista

dato che se si installa nell'ordine Xp, Vista, Linux il boot loader di Linux gestisce anche gli altri, di default quest'ultimo imposta come avvio automatico dopo il countdown l'avvio di Linux

Per mettere di default Windows Xp si deve modificare il numero dell'Os da avviare e per fare questo basta andare al percorso

/boot/grub/menu.lst

si deve accedere come root per poter modificare il file
cercare la voce

# 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 change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default 0

e modificare Default 0 con il numero os che si desidera

# 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 change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default 9

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10

## 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=5dc43f73-55b7-40b1-b6fa-d42f8af4039c ro
# kopt_2_6=root=/dev/hdc2 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,1)

## 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

## 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

## ## End Default Options ##

title Ubuntu, kernel 2.6.17-11-generic
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-11-generic root=/dev/hdc2 ro quiet splash
initrd /boot/initrd.img-2.6.17-11-generic
quiet
savedefault
boot

title Ubuntu, kernel 2.6.17-11-generic (recovery mode)
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-11-generic root=/dev/hdc2 ro single
initrd /boot/initrd.img-2.6.17-11-generic
boot

title Ubuntu, kernel 2.6.17-10-386
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-10-386 root=/dev/hdc2 ro quiet splash
initrd /boot/initrd.img-2.6.17-10-386
quiet
savedefault
boot

title Ubuntu, kernel 2.6.17-10-386 (recovery mode)
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-10-386 root=/dev/hdc2 ro single
initrd /boot/initrd.img-2.6.17-10-386
boot

title Ubuntu, kernel 2.6.17-10-generic
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-10-generic root=/dev/hdc2 ro quiet splash
initrd /boot/initrd.img-2.6.17-10-generic
quiet
savedefault
boot

title Ubuntu, kernel 2.6.17-10-generic (recovery mode)
root (hd0,1)
kernel /boot/vmlinuz-2.6.17-10-generic root=/dev/hdc2 ro single
initrd /boot/initrd.img-2.6.17-10-generic
boot

title Ubuntu, memtest86+
root (hd0,1)
kernel /boot/memtest86+.bin
quiet
boot

### 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/hdc1
title Windows Vista/Longhorn (loader)
root (hd0,0)
savedefault
makeactive
chainloader 0

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Microsoft Windows XP Professional
root (hd1,0)
savedefault
makeactive
map (hd0) (hd1)
map (hd1) (hd0)
chainloader +1

in questo caso il numero 9