$ sudo apt-get update
$ sudo apt-get install freeradius-iodbc 

freeradius-iodbc is installed in your system.

Make ensure the freeradius-iodbc package were installed using the commands given below,

$ sudo dpkg-query -l | grep freeradius-iodbc *

You will get with freeradius-iodbc package name, version, architecture and description in a table

freeradius-iodbc package basic information: