Recover Ubuntu Grub loader after installing Windows
If you run a dual-boot system with Linux and Windows, this has happened to you. You had to do your monthly reinstall of Windows, and now you don’t see the linux bootloader anymore, so you can’t boot into Ubuntu or whatever flavor of linux you prefer.
Here’s the quick and easy way to re-enable Grub.
1) Boot off the Live CD
2) Open a Terminal and type in the following commands, noting that the first command will put you into the grub “prompt”, and the next 3 commands will be executed there. Also note that hd0,0 implies the first hard drive and the first partition on that drive, which is where you probably installed grub to during installation. If not, then adjust accordingly.
sudo grub
> root (hd0,0)
> setup (hd0)
> exit
Reboot (removing the live cd), and your boot menu should be back.
Only read below if Windows is now missing from the boot menu
If you installed Ubuntu before you installed Windows, then Ubuntu will not have anything in the grub configuration for Windows. This is where you’ll have to do a bit of manual editing to the grub boot menu file.
If you open the file /boot/grub/menu.lst with the following command:
sudo gedit /boot/grub/menu.lst
You’ll see a sample section for Windows, which you’ll want to uncomment and add to the boot menu list in whatever position you want it in. (uncomment by removing the #’s)
# title Windows 95/98/NT/2000/XP/Vista
# root (hd0,0)
# makeactive
# chainloader +1
Note that you should also verify that hd0,0 is the correct location for Windows. If you had installed Windows on the 4th partition on the drive, then you should change it to (hd0,3)
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thanks a million!! helped a noob in serious trouble
Thanks a ton! I’ve been looking for this for a long time. Thanks again!
Now how do we do this with GRUB 2?
Thanks.
Hi
I could not recover my Ubuntu 10.04, because when I type “sudo grub”, it gives o/p as “command not found”. Please help me to overcome this problem. I am inserting live CD.
I have a dell xps laptop. which has got vista .
After working on dual boot for a long time I had to format vista.
Now I dont see the grub menu which used show up at system boot, earlier.
By default system boots into vista now. No traces of earlier boot menu.But the Ubuntu Partitions r still there.
Can anyone help me in the issue.
I would need the system to dual boot just it like earlier.
Thanks
Thanks a lot. I was looking for this solution from long time.My windows crashed and i am using only ubuntu from long time.I will try to install windows again and try dual boot.thanks for the tip again.
for grub 2:
Using Ubuntu 9.10 livecd or higher
Here assuming the Ubuntu partition is sda7,and /boot partition is sda6 (if you have a separate /boot partition).
Boot up ubuntu from the livecd,open terminal and run:
sudo -i
mount /dev/sda7 /mnt
mount /dev/sda6 /mnt/boot #skip this one if not have a separate /boot partition
grub-install –root-directory=/mnt/ /dev/sda
that’s all (ubuntu tunisia)
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