j4-dmenu-desktop software package provides faster replacement for i3-dmenu-desktop, 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 j4-dmenu-desktop
j4-dmenu-desktop is installed in your system.
Make ensure the j4-dmenu-desktop package were installed using the commands given below,
$ sudo dpkg-query -l | grep j4-dmenu-desktop *
You will get with j4-dmenu-desktop package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | j4-dmenu-desktop |
| Version | 2.13-1 |
| Description | faster replacement for i3-dmenu-desktop |
| Sub Section | X328 |