What should be done when grub secure issue occurs?

Answered 3 years ago (Jan 22, 2021) by Eldernode Staff

First, boot your Linux operating system on cd or USB. Then open the terminal environment and enter the following command:

sudo fdisk -l

Find the partition of your Linux system and then copy the following command and enter it in the terminal. You must select sda3 according to your system requirements:

sudo mount /dev/sda3 /mnt

Then enter the following commands in order:

sudo mount --bind /dev /mnt/dev

sudo chroot /mnt

Then you can install and update Grub with the following command:

grub-install /dev/sda && sudo update-grub

After restarting the system, you will no longer have a grub problem.