$ sudo apt-get update
$ sudo apt-get install radiusd-livingston 

radiusd-livingston is installed in your system.

Make ensure the radiusd-livingston package were installed using the commands given below,

$ sudo dpkg-query -l | grep radiusd-livingston *

You will get with radiusd-livingston package name, version, architecture and description in a table

radiusd-livingston package basic information: