ejabberd-mod-message-log software package provides writes a line for each message to a log file, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ejabberd-mod-message-log
ejabberd-mod-message-log is installed in your system.
Make ensure the ejabberd-mod-message-log package were installed using the commands given below,
$ sudo dpkg-query -l | grep ejabberd-mod-message-log *
You will get with ejabberd-mod-message-log package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Network |
| Package | ejabberd-mod-message-log |
| Version | 0.2016.08.01~dfsg0-1 |
| Description | writes a line for each message to a log file |
| Sub Section | Net |