aircrack-ng software package provides wireless WEP/WPA cracking utilities, 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 aircrack-ng
aircrack-ng is installed in your system.
Make ensure the aircrack-ng package were installed using the commands given below,
$ sudo dpkg-query -l | grep aircrack-ng *
You will get with aircrack-ng package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | aircrack-ng |
| Version | 1:1.2-0~beta3-4 |
| Description | wireless WEP/WPA cracking utilities |
| Sub Section | Net |