CentOS启动管理

一块250G的硬盘上首先安装了xp系统，然后又安装了CentOS，默认开机启动的是CentOS，如果希望默认启动的是xp，则进行如下操作！

修改/boot/grub/grub.conf文件内容：

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,2)
# kernel /vmlinuz-version ro root=/dev/mapper/vg_xgoa-lv_root
# initrd /initrd-[generic-]version.img
#boot=/dev/sdb
default=2
timeout=10
splashimage=(hd0,2)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-279.19.1.el6.i686)
root (hd0,2)
kernel /vmlinuz-2.6.32-279.19.1.el6.i686 ro root=/dev/mapper/vg_xgoa-lv_root rd_NO_LUKS rd_LVM_LV=vg_xgoa/lv_root rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 KEYBOARDTYPE=pc KEYTABLE=us rd_LVM_LV=vg_xgoa/lv_swap rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-279.19.1.el6.i686.img
title CentOS (2.6.32-279.el6.i686)
root (hd0,2)
kernel /vmlinuz-2.6.32-279.el6.i686 ro root=/dev/mapper/vg_xgoa-lv_root rd_NO_LUKS rd_LVM_LV=vg_xgoa/lv_root rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 KEYBOARDTYPE=pc KEYTABLE=us rd_LVM_LV=vg_xgoa/lv_swap rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-279.el6.i686.img
title Windows XP
rootnoverify (hd0,0)

chainloader +1

其中每一个title代表一个可以启动的系统，default=0表示启动第一个title，我的xp位于第三个title所以设置default=2即可！