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How to repair your Linux Grub Bootloader..

 

So you broke grub? Boot from a live cd, [find your linux partition under /dev and use fdisk to find the linux partion] mount the linux partition, add /proc and /dev and use grub-install /dev/xyz. Suppose linux lies on /dev/sda6:

 

# mount /dev/sda6 /mnt # mount the linux partition on /mnt

# mount --bind /proc /mnt/proc # mount the proc subsystem into /mnt

# mount --bind /dev /mnt/dev # mount the devices into /mnt

# chroot /mnt # change root to the linux partition

# grub-install /dev/sda # reinstall grub with your old settings