ejabberd-contrib software package provides user-contributed modules for ejabberd, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ejabberd-contrib
ejabberd-contrib is installed in your system.
Make ensure the ejabberd-contrib package were installed using the commands given below,
$ sudo dpkg-query -l | grep ejabberd-contrib *
You will get with ejabberd-contrib package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Network |
| Package | ejabberd-contrib |
| Version | 0.2014.09.22-1 |
| Description | user-contributed modules for ejabberd |
| Sub Section | Net |