通过修改Ubuntu的Grub来调整多系统的启动顺序

机器上装了双系统(Ubuntu 8.10+WinXP)，每次启动的时候如果不在Grub那里选择WinXP的话就会默认启动到Ubuntu。但是一般我都是用WinXP的，这样每次选择对我这种懒人来说太麻烦了，所以今天我就修改了Grub的配置，让它默认启动WinXP...

我们进入Ubuntu后，打开终端，先备份一下Grub的启动列表文件menu.lst：

复制代码代码如下:

sudo cp /boot/grub/menu.lst /boot/grub/menu.lst.bak

然后使用Gedit来编辑menu.lst

复制代码代码如下:

sudo gedit /boot/grub/menu.lst

打开以后会看到很长很长的东西，不过那些以"#"开头的东西全部都是没用的，而我们要修改的也只有一个地方(大概在18行左右)：default 0

这个0就代表了Grub默认启动项为Ubuntu，而我们要改成...这个因机而已了，我们往下看。

# 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 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=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN

## default grub root device

## e.g. groot=(hd0,0)

# groot=3738b672-62f3-490d-916a-cad379fdb57b

## 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 2.6.27-11-generic

uuid 3738b672-62f3-490d-916a-cad379fdb57b

kernel /vmlinuz-2.6.27-11-generic root=UUID=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN quiet splash

initrd /initrd.img-2.6.27-11-generic

quiet

title Ubuntu 8.10, kernel 2.6.27-11-generic (recovery mode)

uuid 3738b672-62f3-490d-916a-cad379fdb57b

kernel /vmlinuz-2.6.27-11-generic root=UUID=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN single

initrd /initrd.img-2.6.27-11-generic

title Ubuntu 8.10, kernel 2.6.27-7-generic

uuid 3738b672-62f3-490d-916a-cad379fdb57b

kernel /vmlinuz-2.6.27-7-generic root=UUID=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN quiet splash

initrd /initrd.img-2.6.27-7-generic

quiet

title Ubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)

uuid 3738b672-62f3-490d-916a-cad379fdb57b

kernel /vmlinuz-2.6.27-7-generic root=UUID=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN single

initrd /initrd.img-2.6.27-7-generic

title Ubuntu 8.10, memtest86+

uuid 3738b672-62f3-490d-916a-cad379fdb57b

kernel /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/sda1

title Microsoft Windows XP Professional

root (hd0,0)

savedefault

makeactive

chainloader +1

恩，我用了7种不同的颜色标记了下面的每一部分，依次编号为0、1、2、3、4、5、6。所以我们看到WinXP系统的编号是6，所以我们只要把 default 0 修改为 default 6 就可以了。

这个是我的电脑，XP的编号为6，你的电脑需要你自己去看是多少。

PS.这里有个技巧，你需要数有多少个title就可以啦，哈哈！

另外上面我不同颜色标记的东西是可以删除的，删除以后Grub启动列表里的对应项目就会消失，貌似可以美观一些，嘎嘎...