acpitool-dbg software package provides command line ACPI client (debug), 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 acpitool-dbg
acpitool-dbg is installed in your system.
Make ensure the acpitool-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep acpitool-dbg *
You will get with acpitool-dbg package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Debug packages |
| Package | acpitool-dbg |
| Version | 0.5.1-4+b3 [amd64], 0.5.1-4+b2 |
| Description | command line ACPI client (debug) |
| Sub Section | debug |