I wish to password protect grub bootloader. I tried the steps available on online manuals as of RedHat, Ubuntu, etc. All experiments were on a VirtualBox machine, so my system remains safe. However, I didn't get success. Every time I write the line to the config file and run update-grub, I get the response "password : command not found".
I made experiments with the following files: /etc/grub.d/00_header /etc/grub.d/40_custom /boot/grub/grub.cfg adding " set superusers="root" password root rootpassword " or " password mypassword " or " password --md5 $$$%#$ " different times. Each time, I had the same error generated. My current system, where changes are expected has Debian Stretch on a UEFI installation. So, I have no idea whether the things are same or different for UEFI and Legacy. Also, when I tried to install grub (for grub-md5-crypt), it asked to remove grub-efi and install grub-pc, grub-legacy and their team. I need EFI because I have Windows as dual boot, I haven't used for long, but I still want to retain it. Regards Himanshu Shekhar
