boot-info-script software package provides inspect boot environment, 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 boot-info-script
boot-info-script is installed in your system.
Make ensure the boot-info-script package were installed using the commands given below,
$ sudo dpkg-query -l | grep boot-info-script *
You will get with boot-info-script package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | boot-info-script |
| Version | 0.61-2 |
| Description | inspect boot environment |
| Sub Section | admin |