ejabberd-mod-cron software package provides execute scheduled commands, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ejabberd-mod-cron
ejabberd-mod-cron is installed in your system.
Make ensure the ejabberd-mod-cron package were installed using the commands given below,
$ sudo dpkg-query -l | grep ejabberd-mod-cron *
You will get with ejabberd-mod-cron package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | ejabberd-mod-cron |
| Version | 0.2016.01.12~dfsg0-1 |
| Description | execute scheduled commands |
| Sub Section | Net |