Tutorial for Grub 2 recovery

Grub 2 recovery

We often come across a condition in which the boot loader gets corrupt. Here are a few steps that will help you recover your GRUB 2 boot loader.
Boot from a live CD or DVD, Which supports GRUB 2 (Ubuntu 9.10 CD or A DVD will take more time than a CD, so I suggest you boot from a CD).
Open the terminal and run fdisk -l to check the partition from which you want to recover GRUB 2.
Here I assume that you want to recover it from /dev/sda1.
Then run the following commands:

$sudo mkdir /media/sda1 $sudo mount /dev/sda1/media/sda1 $sudo mount --bind /dev /media/sda1/dev $sudo mount --bind /proc /media/sda1/<span class="GINGER_SOFATWARE_mark" ginger_sofatware_uiphraseguid="3fd64c47-30e8-45b0-90b6-3ab942f867b1" id="b1828793-ca2f-49c5-8f00-92c4cb7f51bd">proc</span>

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$sudo mkdir /media/sda1   $sudo mount /dev/sda1/media/sda1   $sudo mount --bind /dev /media/sda1/dev   $sudo mount --bind /proc /media/sda1/proc

Now chroot into that partition by running the command given below:

$sudo <span class="GINGER_SOFATWARE_mark" ginger_sofatware_uiphraseguid="abaefe31-ea4a-4ab0-a902-e7cf9c4fbd6c" id="33159db4-100e-4345-af77-845f92da1742">chroot</span> /media/sda1

1	$sudo chroot /media/sda1

Then re-install GRUB , as follows:

#grub-install /dev/sda

1	#grub-install /dev/sda

The output should be like what’s shown below:

<span class="GINGER_SOFATWARE_mark" ginger_sofatware_uiphraseguid="1f08ad5c-ff9d-4645-aa77-e497cf9efa15" id="52b6ae22-225e-44dc-96c4-a1bb52d09f29">Installation</span> finished. No error reported.

1	Installation finished. No error reported.

If you get an error, then try the following command:

#grub-install --recheck /dev/sda

1	#grub-install --recheck /dev/sda

After a successful installation, exit from chroot and unmount the file systems that were mounted to recover GRUB. Now reboot.

#exit $sudo unmount /media/sda1/<span class="GINGER_SOFATWARE_mark" ginger_sofatware_uiphraseguid="f2f91f90-a63c-4c07-b812-8bbf12494017" id="d797a7e8-c80a-495e-976f-0c01077f02e4">proc</span> $sudo unmount /media/sda1/dev $sudo unmount /media/sda1 $sudo reboot

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#exit   $sudo unmount /media/sda1/proc   $sudo unmount /media/sda1/dev   $sudo unmount /media/sda1   $sudo reboot

You’ve successfully completed recovering your boot loader. Try this it will help you for sure. Be careful while doing this and keep the steps in your mind.