grub-legacy software package provides GRand Unified Bootloader (Legacy version), you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install grub-legacy
grub-legacy is installed in your system.
Make ensure the grub-legacy package were installed using the commands given below,
$ sudo dpkg-query -l | grep grub-legacy *
You will get with grub-legacy package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | grub-legacy |
| Version | 0.97-70 |
| Description | GRand Unified Bootloader (Legacy version) |
| Sub Section | admin |