choosewm software package provides fake x-session-manager allowing the user to choose a wm, 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 choosewm
choosewm is installed in your system.
Make ensure the choosewm package were installed using the commands given below,
$ sudo dpkg-query -l | grep choosewm *
You will get with choosewm package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | choosewm |
| Version | 0.1.6-3 |
| Description | fake x-session-manager allowing the user to choose a wm |
| Sub Section | X90 |