anchor.diff:  
   In this section, we will provide some tips to verify the operation of the system, and what to do when things are not working.
   
  -=== System Health and Information
  -
  -To verify the correct operation (health) of the various software components, login to your EC2 instance and issue the following command:
  +If your installation does not seem to work correctly, the first step is to review your installation process carefully, to be sure that everything has been done and checked as described in this document. If problems persist, we will be glad to work with you to identify the problem. To help us to do this, there are several information reports that you may need to gather. These reports are somewhat technical but can be analyzed by Kill Bill personnel. This section explains how to obtain the reports that may be needed.
  +
  +=== System Health Check
  +
  +The healthcheck report checks the health of various software components, and determines if any queues are growing improperly over time. To create this report, login to your EC2 instance and issue the following command:
   
   `curl http://127.0.0.1:8080/1.0/healthcheck`
   
   This will return a series of messages giving the health status of each component.
   
  +=== System Information
  +
   For a detailed system information report, use the following command:
   
   `curl -u ADMIN:PASSWORD http://127.0.0.1:8080/1.0/kb/nodesInfo`
   
   Here ADMIN and PASSWORD are your KAUI administrator access credentials.
   
  -The Kill Bill single-tier option is composed of four services. The status of each service can be checked by the following commands:
  +=== Service Statuses
  +
  +This procedure does not produce a report, but does provide important information about the status of each service.
  +
  +
  +The Kill Bill single tier option is composed of four services. The status of each service can be checked by the following commands:
   
   * Kill Bill service: `sudo service killbill status`
   * KAUI service: `sudo service kaui status`
  
positive.code: 
  The `Let's Encrypt` certifcates are only valid 90 days and will therefore neeed to be renewed. `certbot` will create a cron entry under `/etc/cron.d/certbot` to make this process automatic.
  
  == Maintenance
  
  
  
  
negative.code: 
  The load balancer `nginx` should normally require little attention. The configuration files are located under `/etc/nginx/. The configuration file for `nginx itself is `/etc/nginx/nginx.conf`. Additional configuration files are located under `/etc/nginx/sites-enabled/`. The only file normally present in this directory is `/etc/nginx/sites-enabled/killbill.conf`. This file may need to be edited to enable SSL, as explained above.
  
  