boot manager is missing, ubuntu 12.04

Question

I did a clean installation of ubuntu 12.04 from a usb stick. After installation, first boot was normal so i logged in installed some apps and lenses and downloaded updates. When I rebooted to install updates after bios screen it said boot manager is missing, press alt+ctrl+del to restart. so how can i repair/install mbr? thanx

Answer 1

The boot manager for Ubuntu, GRUB2, was probably broken when you were installing updates. Try using Boot Repair to fix it. First boot to the Ubuntu live CD. Open a terminal window and run the following code to install and run boot repair:

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

Then follow the instructions and options in the program to repair your boot.

You can visit http://www.howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot/ for more information.