Minimal BASH-like supported... after installing Debian. How to proceed now?

Question

I just installed Debian Stretch from a live USB. I left the installation do all the partition and such automatically. But I reboot to a black screen that says:

Minimal BASH-like line editing is supported...

In which direction should I go now?

EDIT:

I can boot every time if I type this cryptic arcane I blindly copied from a forum:

set root=(hd0,gpt2)

linux /boot/vmlinuz-3.16.0-4-amd64 root=/dev/sda2 ro

initrd /boot/initrd.img-3.16.0-4-amd64

boot

How can I do those changes permanent? I'm almost there.

Answer 1

Somehow grub configuration of your system isn't made properly. You can either make the grub entries manually or use grub2-mkconfig tool to make it for you.

Find for the file named grub.cfg in /boot probably it'll be in /boot/grub/grub.cfg.

If you want to do it manually make the following entey in the file.

menuentry 'Debian' {
set root=(hd0,gpt2)
linux /boot/vmlinuz-3.16.0-4-amd64 root=/dev/sda2 ro         
initrd /boot/initrd.img-3.16.0-4-amd64
}

Or you can install grub2-mkconfig as follows once after booting the system manually. (Recommended)

sudo apt install grub2-tools

Make a backup of your existing grub.cfg

cp /boot/grub/grub.cfg /boot/grub/grub.cfg.back

Then generat new grub.cfg using grub2-mkconfig as follows

grub2-mkconfig >/boot/grub/grub.cfg

Now your system shall boot normally

Note I've assumed location of grub.cfg in your system is /boot/grub/grub.cfg. If you find a different location please use that location.