I installed the windows and Ubuntu dual system, hand cheap in Windows moved the original mounted on the Ubuntu system on a disk, this thought is not originally originally zoned to Ubuntu HDD
Space, and in Windows Explorer is also visible and available, and finally formatted a bit, you can not go to Ubuntu, it is very strange
But the online Ubuntu forum has introduced solutions
1. Use the LS command first to find out which partition Ubuntu is installed on:
Grub Rescue>ls
Will list all the disk partition information, for example:
(hd0), (HD0,MSDOS3), (Hd0,msdos2), (HD0,MSDOS1)
2. Then call the following command: MSDOSX for each partition, note that there is no space between MSDOS and numbers!
Grub Rescue>ls (HD0,MSDOSX)/boot/grub
If you can't find it, you need to check if the path to grub is incorrect due to the Linux version differences
For example Direct LS (hd0,x)/grub and so on.
3. Assuming that the files in the folder are displayed when found (HD0,MSDOS3), Linux is installed on this partition.
Here I am (HD0,MSDOS7)
4. Call the following command:
Grub Rescue>set root= (HD0,MSDOS3)
Grub Rescue>set prefix= (HD0,MSDOS3)/boot/grub
Grub Rescue>insmod/boot/grub/normal.mod
It should be noted here that some machines normal.mod directly in the/boot/grub/can be found, but some can not, we through the LS (hd0,msdosx)/boot/grub command can see a i386-pc folder, I was estimated a bit, Then LS (HD0,MSDOSX)/boot/grub/i386-pc can see a bunch of files, a lot of. mod files, so I guess normal.mod right here, so above Grub Rescue>set root= (hd0, MSDOS3)
Grub Rescue>set prefix= (HD0,MSDOS3)/boot/grub
Grub Rescue>insmod/boot/grub/normal.mod steps can be rewritten as: Grub Rescue>set root= (HD0,MSDOS3)
Grub Rescue>set prefix= (HD0,MSDOS3)/boot/grub
Grub Rescue>insmod/boot/grub/i386-pc/normal.mod on the go. 5. Then call the following command to display the missing Grub menu.
Grub Rescue>normal
6. Don't be happy, however, if the problem persists, we need to go to Linux and fix grub.
After entering Linux, execute at the command line:
sudo update-grub
sudo grub-install/dev/sda
(SDA is your hard drive number, do not specify the partition number, such as SDA1,SDA5, etc. are not correct)
7. Restart the test to see if the Grub boot menu has been restored.
Ubuntu boot appears grub rescue> Terminal Mode Repair method
