aptitude install initramfs-tools
apt-get install --reinstall grub

mkdir /boot/grub

Searching for GRUB installation directory ... found: /boot/grub
Probing devices to guess BIOS drives. This may take a long time.
Unknown partition table signature
Unknown partition table signature
Searching for default file ... Generating /boot/grub/default file and setting the default boot entry to 0
Searching for GRUB installation directory ... found: /boot/grub
Testing for an existing GRUB menu.lst file ...


Generating /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-4.10.0-041000-generic
Found kernel: /boot/vmlinuz-3.16.0-4-amd64
Updating /boot/grub/menu.lst ... done