Tuesday, February 18, 2014
Reinstall GRUB2 after installing Windows
If you install Windows after installing Linux, windows will erase Linuxs GRUB. You have to re-install GRUB which will allow you to boot both Windows and Linux.
Now chroot to /mnt:
sudo chroot /mnt
Now install grub:
grub-install /dev/sda
Now update the grub:
update-grub2 && update-grub
Now you will see the GRUB and can boot between Linux and Windows. If you dont see the Windows option in GRUB menu, open the Linux that is present in GRUB and run the last command of this tutorial.
Reinstalling GRUB legacy was very easy but now with GRUB2 you have to do little more.
Follow the steps below, you need to know where your / (root) partition is.
Boot your computer from Ubuntu Live CD.
Choose Try Live CD
Once the desktop loads, Open Terminal from Applications menu -> Accessories
Type: sudo fdisk -l
From here you can figure out your root partition.
Now if your root partition is /dev/sda1 follow the following commands below:
sudo mount /dev/sda1 /mnt
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
Now chroot to /mnt:
sudo chroot /mnt
Now install grub:
grub-install /dev/sda
Now update the grub:
update-grub2 && update-grub
Now you will see the GRUB and can boot between Linux and Windows. If you dont see the Windows option in GRUB menu, open the Linux that is present in GRUB and run the last command of this tutorial.
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