docker software package provides System tray for KDE3/GNOME2 docklet applications, 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 docker
docker is installed in your system.
Make ensure the docker package were installed using the commands given below,
$ sudo dpkg-query -l | grep docker *
You will get with docker package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | docker |
| Version | 1.5-1 |
| Description | System tray for KDE3/GNOME2 docklet applications |
| Sub Section | X148 |