Create your password by typing # grub-mkpasswd-pbkdf2 Enter your password. This will generate a long and encrypted password. Copy the whole generated code and Edit the file /etc/grub.d/00_header using vi, leafpad, nano e.g # vi /etc/grub.d/00_header or # sudo leafpad /etc/grub.d/00_header Go to the end of the file. Type the following command cat << EOF set superusers="username" password_pbkdf2 username 'paste the generated code copied above here' EOF Save the changes and exit the editor & update grub using either of the commands # update-grub or # grub-mkconfig -o /boot/grub/grub.cfg To test the changes, reboot the system. If the procedure above was successful, once you select grub entry to boot, you will be prompted to enter username and password. Enter those credentials and your grub is secured!!!!