1. 我的環境:
Ubuntu 10.04
2. 關鍵位置和文件:
/boot/grub/grub.cfg 文件;
/etc/grub.d/ 目錄;
/etc/default/grub 文件;
3. 查看/boot/grub/grub.cfg 文件:
### BEGIN /etc/grub.d/10_linux ###
menuentry '
Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os {
}
menuentry '
Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "
Memory test (memtest86+)" {
}
menuentry "
Memory test (memtest86+, serial console 115200)" {
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "
Microsoft Windows XP Professional (on /dev/sda1)" {
}
### END /etc/grub.d/30_os-prober ###
注意:從0開始計數,Ubuntu10.04啟動項為0;Windows XP啟動項為4;
4. 修改 /etc/default/grub 文件 :
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
GRUB_DEFAULT=4
注意:GRUB_DEFAULT的默認值為0;
5. 執行命令:
$ sudo update-grub
6. 重新啟動。