duply software package provides easy to use frontend to the duplicity backup system, 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 duply
duply is installed in your system.
Make ensure the duply package were installed using the commands given below,
$ sudo dpkg-query -l | grep duply *
You will get with duply package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | duply |
| Version | 1.11.3-1 |
| Description | easy to use frontend to the duplicity backup system |
| Sub Section | Utils |