9wm software package provides X11 window manager inspired by Plan 9s rio, 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 9wm
9wm is installed in your system.
Make ensure the 9wm package were installed using the commands given below,
$ sudo dpkg-query -l | grep 9wm *
You will get with 9wm package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | 9wm |
| Version | 1.3.5-1 |
| Description | X11 window manager inspired by Plan 9s rio |
| Sub Section | X12 |