REPAIRING GRUB IN UBUNTU 10.04 +++

How to repair GRUB in ubuntu 11.10 using a live CD.

1.  Boot in your computer using a live ubuntu 11.10 cd.
2. Fire up the terminal and type:

             sudo su

       This ensures that you are the root user while making this changes.

      3.Type fdisk -l  and note the partition containing Ubuntu.It should be something like " /dev/sdaXXX" with         an ext4 extension.

       4.The type mount  /dev/sdaXX  /mnt

                     This mounts the ubuntu partition

       5.Type the following commands noting the spaces.

                    a)mount --bind /dev  /mnt/dev

                       followed by.

                    b)mount --bind /proc   /mnt/proc

         6.copy the resolv.conf file by typing in the following command.

                  cp /etc/resolv.conf    /mnt/etc/resolv.conf

         7.Then 

               chroot /mnt

          8.Install grub by 

               grub-install --recheck /dev/sdY(Replace Y with your actual hard disk)

           9.Update grub

                   update-grub

          10.Re start your computer

                     reboot

           11.You can now enjoy using your computer if everything went correctly.