acpi-fakekey software package provides tool to generate fake key events, 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 acpi-fakekey
acpi-fakekey is installed in your system.
Make ensure the acpi-fakekey package were installed using the commands given below,
$ sudo dpkg-query -l | grep acpi-fakekey *
You will get with acpi-fakekey package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | acpi-fakekey |
| Version | 0.142-6 |
| Description | tool to generate fake key events |
| Sub Section | admin |