herbstluftwm software package provides manual tiling window manager for X11, 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 herbstluftwm
herbstluftwm is installed in your system.
Make ensure the herbstluftwm package were installed using the commands given below,
$ sudo dpkg-query -l | grep herbstluftwm *
You will get with herbstluftwm package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | X Window System software |
| Package | herbstluftwm |
| Version | 0.5.3-1 |
| Description | manual tiling window manager for X11 |
| Sub Section | x11 |