雙系統（windows和Linux）如何設定啟動順序，我的/boot/grub/menu.lst內容如下：

default=1

timeout=5

hiddenmenu

title windows xp

root (hd0, 0)

chainloader +1

title ubuntu 9.10

root (hd1, 1)

kernel /boot/vmlinuz-2.6.31-15-generic ro root=/dev/sdb1

### 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=d5d2551b-7b67-4cc3-bb0d-e967c1a4f959 ro

 

## default grub root device

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

# groot=d5d2551b-7b67-4cc3-bb0d-e967c1a4f959

 

## 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

 

## specify if running in Xen domU or have grub detect automatically

## update-grub will ignore non-xen kernels when running in domU and vice versa

## e.g. indomU=detect

##      indomU=true

##      indomU=false

# indomU=detect

 

## 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