ubuntu学习摘要－改变默认系统-优快云博客

本文介绍如何通过编辑GRUB配置文件来更改系统的默认启动项。以将默认启动的操作系统从Ubuntu更改为Windows XP为例，详细说明了具体的修改步骤。

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设置grub,改变默认进入的操作系统。

sudo gedit /boot/grub/menu.lst
修改中间的 default=0

比如我的是这样的：
## 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 0 ／／／／／／修改这个值

title Ubuntu, kernel 2.6.15-23-386
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-23-386 root=/dev/hda3 ro quiet splash
initrd /boot/initrd.img-2.6.15-23-386
savedefault
boot

title Ubuntu, kernel 2.6.15-23-386 (recovery mode)
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-23-386 root=/dev/hda3 ro single
initrd /boot/initrd.img-2.6.15-23-386
boot

title Ubuntu, memtest86+
root (hd0,2)
kernel /boot/memtest86+.bin
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/hda1
title Microsoft Windows XP Professional
root (hd0,0)
savedefault
makeactive
chainloader +1

现在要把 xp作为默认的操作系统，那就把default=0改为default=4。