anchor.diff:  session    	 include     	system-auth
   ------
   
  +
   Testing the configuration :
   ---------------------------
   
  
positive.code: 
  
  Installation of pam_yubico module
  -----------------------------------
  Build instructions for pam_yubico are available in the README.
  (https://github.com/Yubico/yubico-pam/wiki/ReadMe)
  
  Configuration of pam_yubico module 
  ------------------------------------
  Configuration instructions for pam_yubico are also available in the README.
  (https://github.com/Yubico/yubico-pam/wiki/ReadMe)
  
  NOTE: Make sure you set your system up for either central authorization mapping,
  or user level mapping, as this will control which users can connect to the
  system using RADIUS.
  
  Configuration of modified pam_yubico.so module at administrative level
  ------------------------------------------------------------------------
  
negative.code: -------------
  We assume that FreeRADIUS is already installed on the server.
  
  
  Configuration of FreeRADIUS server to support PAM authentication
  ----------------------------------------------------------------
  
  * Edit the radiusd configuration file `/etc/raddb/radiusd.conf` to make
    following changes:
  