congruity software package provides graphical utility to configure Logitech Harmony remotes, 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 congruity
congruity is installed in your system.
Make ensure the congruity package were installed using the commands given below,
$ sudo dpkg-query -l | grep congruity *
You will get with congruity package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | congruity |
| Version | 18-04-16 |
| Description | graphical utility to configure Logitech Harmony remotes |
| Sub Section | Utils |