Restaurar GRUB Kali Linux

#sudo fdisk -l
#mount /dev/sda# /mnt
#mount –bind /dev /mnt/dev
#mount –bind /proc /mnt/proc
#mount –bind /sys /mnt/sys
#chroot /mnt
/#grub-install /dev/sda
/#grub-mkconfig -o boot/grub/grub.cfg
(ctrl+D)
/#exit
#umount /mnt/dev
#umount /mnt/proc
#umount /mnt/sys
#umount /mnt
#reboot