avahi-discover software package provides Service discover user interface for avahi, 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 avahi-discover
avahi-discover is installed in your system.
Make ensure the avahi-discover package were installed using the commands given below,
$ sudo dpkg-query -l | grep avahi-discover *
You will get with avahi-discover package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | avahi-discover |
| Version | 0.6.32-1 |
| Description | Service discover user interface for avahi |
| Sub Section | Net |