freeradius-common software package provides FreeRADIUS common files, 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 freeradius-common
freeradius-common is installed in your system.
Make ensure the freeradius-common package were installed using the commands given below,
$ sudo dpkg-query -l | grep freeradius-common *
You will get with freeradius-common package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | freeradius-common |
| Version | 2.2.8+dfsg-0.1build2 |
| Description | FreeRADIUS common files |
| Sub Section | Net |