ubuntu 14.04 ( This machine )

1、 Use the following command to view the partition :

grub rescure> ls

           (hd0,msdos7),(hd0,msdos8),(hd0,msdos9)...

2、 In fact, the key is to find grub.cfg In which division .

Of course ubuntu It's like this :(/boot It's partitioned separately )ps. My name is partition 9, The other reference is minus one , But my partition 8 No, , Partition 7 Yes ......

grub rescure> ls (hd0, msdos7)/grub

           ............................................... grub.cfg eureka , Others are error

without , Try one partition at a time , Until a long string of And finally ././//././grub.cfg

3、 Then there's the setup

grub rescure> set root=(hd0,msdos7)
grub rescure> set prefix=(hd0,msdos7)/grub
grub rescure> insmod normal
grub rescure> normal

4、 At this point, it should have entered

Then turn on the terminal update grub

            sudo update-grub

            grub-install /dev/sda

5、 complete

Be careful : If /root Without a separate partition You can refer to the steps on the Internet ( Just search for it )

If it doesn't work out , It's likely to have to be done in another way .

 

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