21 November 2012

How To Reinstall/Repair The GRUB 2 Boot Loader Under Ubuntu 12.10/12.04



In this tutorial, we will show you how to use the Boot Repair utility to fix the Grub2 boot loader under Ubuntu/Linux Mint. Boot Repair is useful for users having boot issues that occur mainly when dual-booting Ubuntu with other operating systems like Windows 8/7, etc. You can also use it to re-install Grub 2 when you have misconfigured the boot loader.

Requirements

  • Ubuntu Live CD/USB (Ubuntu 12.10/12.04)
  • Internet Connection
1. Booting from Live CD/USB

Boot into your live CD/USB and from the first screen, select "Try Ubuntu without installing":


Then wait until your desktop loads completely.

2. Installing Boot Repair

Open now the terminal and install Boot Repair with these commands:

sudo add-apt-repository ppa:yannubuntu/boot-repair 
sudo apt-get update 
sudo apt-get install boot-repair boot-sav

3. Fixing/Re-installing Grub2

You can now start Boot-Repair with this command:

boot-repair

From the main interface of the application, click "Recommended repair (...)":



For advanced users, you may click "Advanced options" for more actions (restore MBR, repair file systems, change default OS, etc.):



If the repair is successful, you will get this message:


Reboot now your system to finish. The Grub2 boot menu will show again other OS installed with Ubuntu.