Rescue Mode Repair Grub

1. Simulate the destruction of MBR boot.

DD If=/dev/zero OF=/DEV/SDA bs=400 count=1

This will not start the system.

Put the Linux system CD and boot. Select the third rescue mode.

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Omitted part of the unimportant, directly to the following interface.

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Chroot/mnt/sysimage # switch to the system on the hard drive

cd/boot/

LS # To see if a file is missing from the boot directory

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grub# Enter the GRUB command line interface

grub> Root (hd0,0)

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grub> Setup (hd0)

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Quit # exit the Grub command interface

Exit # Exit/mnt/sysimage

Reboot # Rebooting the system

Reboot to check if Linux starts properly

Rescue Mode Repair Grub