9wm software package provides emulation of the Plan 9 window manager 8-1/2, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) 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 14 04 lts trusty tahr |
| Section | X Window System software |
| Package | 9wm |
| Version | 1.2-9 |
| Description | emulation of the Plan 9 window manager 8-1/2 |
| Sub Section | x11 |