cupp software package provides generate dictionaries for attacks from personal data, 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 cupp
cupp is installed in your system.
Make ensure the cupp package were installed using the commands given below,
$ sudo dpkg-query -l | grep cupp *
You will get with cupp package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | cupp |
| Version | 0.0+20160624.git07f9b8-1 |
| Description | generate dictionaries for attacks from personal data |
| Sub Section | Miscellaneous |