anchor.diff:  
   
   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
   ------------------------------------------------------------------------
  
positive.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:
  
negative.code: modules in radiusd PAM configuration file.
  
  
  Prerequisites
  -------------
  
  