GRUB Rescue Solutions

09 September 2010

Yup, about Linux. GRUB fails? Here are some tips.

Some time in your happy days of using your epic Linux distro, you would face a simple and clueless problem. GRUB fails to load and gives you this grub-rescue which you don't have any idea what to do with it!

Before you proceed, you might wanna try Super Grub Disk to fix your GRUB.

Solutions for GRUB Failures

Situation: Unknown Filesystem / Corrupted or Deleted GRUB
When Does it Happen: Usually during repartitioning.
1. Boot into your LiveCD.
2. Find out where you installed your distro by typing "sudo fdisk -l"
3. Mount it by typing "sudo mount -t ext4 /dev/sda6 /mnt (please change /dev/sda6 to the partition path of your installed Linux)
4. Install GRUB by typing "sudo grub-install --root-directory=/mnt/ /dev/sda"

Situation: Uninstalled Linux / No GRUB
When Does It Happen: When you delete the Linux partition.
1. This is for Windows 7, to recover Windows' bootloader.
2. Boot from Window 7's System Repair Disk.
3. Open the Command Prompt.
4. Type in "Bootrec.exe /FixMbr" to overwrite the boot record.