In this blog post I will show you how to reinstall grub on kali linux.
GRUB (Grand Unified Bootloader)
GRUB provides a choice to select OS from a multi-booted operating systems or select a specific kernel configuration available on a particular operating system’s partitions. Some times if bootloader fails, user will not have a choice of selecting the OS & therefore be booted to regular default operating system ex, windows or mac.
more about bootloaders here
Steps to reinstall GRUB
Live boot kali using bootable usb
fdisk -l
Select your disk, in mycase it was sda6
mount /dev/sda6 /mnt
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
mount EFI directory
sudo mount /dev/sda1 /mnt/boot/efi
chroot /mnt
grub-install /dev/sda
update-grub
exit
umount /mnt/dev/pts
umount /mnt/dev
umount /mnt/proc
umount /mnt/sys
umount /mnt
Finally, restart your system and you should have your boot-menu back !
Also, please do check my other blog posts on goacademy