avarice software package provides use GDB with Atmel AVR debuggers, 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 avarice
avarice is installed in your system.
Make ensure the avarice package were installed using the commands given below,
$ sudo dpkg-query -l | grep avarice *
You will get with avarice package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Electronics |
| Package | avarice |
| Version | 2.13+svn347-4 |
| Description | use GDB with Atmel AVR debuggers |
| Sub Section | Electronics |