Grub rescue, what to do?

Question

All I get is:

error: unknown filesystem
Entering rescue mode ...
Grub rescue>.

Please help I don't have any idea what to do. I don't have the disk either.

Answer 1

enter these commands,

Grub rescue> set boot=(hd0,msdos6)
Grub rescue> set prefix=(hd0,msdos6)/boot/grub
Grub rescue> insmod normal
Grub rescue> normal

this will allow you to login. Once you logged in run the commands in the terminal,

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

and you should be done