Repair Grub /ubuntu修复启动项

Repair Grub

（亲测是可以解决问题的!）

Assumptions

Your Ubuntu is installed in /dev/sda1 (If you are not sure, type:)

gparted
# OR #
sudo fdisk -l

[edit]Steps

1. Boot with Ubuntu LiveCD or LiveUSB
2. Open Terminal
3. Mount Root partition

sudo mount /dev/sda1 /mnt

4. Mount System mount points

sudo mount --bind /dev /mnt/dev && sudo mount --bind /dev/pts /mnt/dev/pts && sudo mount --bind /proc /mnt/proc && sudo mount --bind /sys /mnt/sys

5. Change Root

sudo chroot /mnt

6. Install

grub-install /dev/sda
grub-install --recheck /dev/sda
update-grub

7. Un-mount

exit && sudo umount /mnt/dev && sudo umount /mnt/dev/pts && sudo umount /mnt/proc && sudo umount /mnt/sys && sudo umount /mnt

8. Finish and Restart

[edit]

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