kadu-common software package provides Gadu-Gadu/XMPP client for X11, 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 kadu-common
kadu-common is installed in your system.
Make ensure the kadu-common package were installed using the commands given below,
$ sudo dpkg-query -l | grep kadu-common *
You will get with kadu-common package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | kadu-common |
| Version | 3.0~rc1-1 |
| Description | Gadu-Gadu/XMPP client for X11 |
| Sub Section | Net |