citadel-suite software package provides complete and feature-rich groupware server; metapackage for full installation, 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 citadel-suite
citadel-suite is installed in your system.
Make ensure the citadel-suite package were installed using the commands given below,
$ sudo dpkg-query -l | grep citadel-suite *
You will get with citadel-suite package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | |
| Package | citadel-suite |
| Version | 9.01-dfsg-1 |
| Description | complete and feature-rich groupware server; metapackage for full installation |
| Sub Section |