GRUB

GRUB is a powerful bootloader which can boot a variety of operation systems, including Unix, Linux and Windows. It is usually installed in the MBR of a disk. This article presents the method how to repair it if it is corrupted.

Above all, open a terminal or switch to a tty, then input commands below step by step:

1. type grub to enter the interface of GRUB.
2. if separate /boot partition exists, input find /grub/stage1; otherwise, input find /boot/grub/stage1 instead.
3. indicate the location for GRUB installation, root (hdX, Y).
4. set up GRUB to hdX ’s MBR, setup (hdX).
5. quit the GRUB program, quit.