In my office, we must use the ugly M$ Windows. So after many year of single GNU/Linux booting, I need to install Windows again as a dual boot.
But with Micro$oft, nothing is easy, even an install… After the installation, the Windows bootloader erase the GNU/Linux boot. To fix that, we need a live CD of a GNU/Linux distribution.
- After the boot in the live CD, just mount the partition
/bootin a folder (in this example
/mnt) with the command
sudo mount /dev/sdXY /mnt(where X is the drive letter and Y the partition).
- Chroot into the mounted folder with the command
sudo chroot /mnt.
- Reinstall GNU/GRUB with
sudo grub-install --root-directory=/mnt /dev/sdX.
- Update the boot menu with
- Reboot and enjoy !