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====win8找回linux ubuntu 和 用win8引导linxu ubuntu====
1. 用u盘启动进入ubuntu 这里我们选择试用ubuntu 而不是安装ubuntu
2. 按 Ctrl+Alt+T 启动终端
3. 进入终端 输入一下命令:
1) sudo -i #进入超级管理员模式
2) fdisk -l #扫描磁盘 确定linux所在的分区位置
3) mount /dev/sda7 /mnt #这里的sda7 是上面通过扫描得来的 不同的电脑是不同的
4) grub-install --root-directory=/mnt /dev/sda #将grub重写到mbr中(或者 --boot-directory=/mnt /dev/sda)
5)#提示finished no error 的字样 就成功了
6) 重启后先进入Ubuntu,然后运行命令:sudo update-grub #更新开机启动项,windows 8启动项。
****************add*****************
2014年04月27日 星期日 15时33分16秒
sudo grub-install /dev/sda
****************add*****************
====Windows 8.1 U盘启动失败问题====
Windows 7 USB DVD Download Tool 制作的U盘无法启动安装 Windows 8.1
解决办法:
以管理员身份运行CMD,执行如下命令:
bootsect /nt60 X: (其中bootsec位于ISO光盘根目录的boot目录中 ,X是当前U盘在系统中的盘符)
以上操作后即可使得制作后的U盘可以引导启动。
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