$ sudo apt-get update
$ sudo apt-get install kamailio-radius-modules 

kamailio-radius-modules is installed in your system.

Make ensure the kamailio-radius-modules package were installed using the commands given below,

$ sudo dpkg-query -l | grep kamailio-radius-modules *

You will get with kamailio-radius-modules package name, version, architecture and description in a table

kamailio-radius-modules package basic information: