Wednesday, July 15, 2009

How to restore Grub from a livecd ubuntu

This will restore grub if you already had grub installed but lost it to a windows install or some other occurence that erased/changed your MBR so that grub no longer appears at start up or it returns an error.

Quote : sudo grub
This will get you a "grub>" prompt (i.e. the grub shell). At grub>. enter these commands

Quote : find /boot/grub/stage1
This will return a location. If you have more than one, select the installation that you want to provide the grub files.
Next, THIS IS IMPORTANT, whatever was returned for the find command use it in the next line (you are still at grub>. when you enter the next 3 commands)

Quote : root (hd?,?)
Again use the value from the find command i.e. if find returned (hd0,9) then you would enter root (hd0,9)

Next enter the command to install grub to the mbr

Quote : setup (hd0)
Finally exit the grub shell
Quote : quit
That is it. Grub will be installed to the mbr.
When you reboot, you will have the grub menu at startup.

Enjoy ubuntu... ;)

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kunkun-laptop .... ;)