mkdir /mnt/c mount /dev/sda3 /mnt/c for i in /sys /proc /run /dev; do sudo mount --bind "$i" "/mnt/c$i"; done #edit /mnt/c/etc/fstab chroot /mnt/c update-initramfs -u update-grub grub-install /dev/sda #ctrl+d for i in /sys /proc /run /dev; do umount "/mnt/c$i"; done umount /mnt/c