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I accidently altered my partition table. Somehow I wiped it out completely and changed the disk label. The system has not been rebooted yet and I managed to rebuild it the way it originally was using the original structure and label however I need to re-install a new bootloader for the new MBR. I have Ubuntu 14.04TLS running inside VirtualBox on a Windows 7 machine. Is there a way to do this without rebooting?

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Have you tried "grub-install" from a terminal? You will need to be root or use sudo.

grub-install

or

sudo grub-install

To see which version you have you can run:

grub-install --version

GRUB1 is versions <= 0.98. Also on the boot loader screen, it should say if it is "GRUB" or "GRUB2".

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  • Thanks - I believe that did it although the big test wont come until I re-boot. I ran sudo grub-install /dev/sda and it reported back "Install finished. No errors reported".
    – user53029
    Aug 25 '14 at 12:23
  • I noticed however that I have Grub2 also installed. How can I tell whether the system is using Grub or Grub2?
    – user53029
    Aug 25 '14 at 12:24
  • If you want to find what version of grub you are running run "grub-install --version". Grub 1 is versions <=0.98. Also on the boot loader screen, it should say if it is "GRUB" or "GRUB2".
    – Phiber
    Aug 26 '14 at 21:09

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