anchor.diff:  * Access logs: `/var/log/nginx/access.log`
   * Error logs: `/var/log/nginx/error.log`
   
  -**System Diagnostics**
  -
  -In order to get some support, the first thing we would require is some information about your deployment. We have created a `diagnostic` command for that effect:
  +=== System Diagnostics
  +
  +If support is needed, we may require some additional detailed information about your deployment. We have created a `diagnostic` command for this purpose. to run this command:
   
   ```
   # Login as 'tomcat'
   > sudo su - tomcat
   #
  -# Assume a 'bob/lazar' tenant
  -# Assume some credentials 'admin/password'
  +# Set your access credentials. This example
  +#   assumes the default credentials are used:
   #
   > kpm  diagnostic \
     --killbill-credentials=admin password \
  
positive.code: * A instance of Kaui listening on `127.0.0.1:3000` (and receiving external traffic through nginx on port `443`)
  * A local `mysql` server running on port `3306`
  
  In this section, we will provide some tips to verify the health of the system, and what to do when things are not working
  
  **SSH to EC2 Instances**
  
  From the EC2 dashboard, in the instance `Description` tab, you can copy the public DNS, called `Public DNS (IPv4)`.
  Then, using the private key you specified when creating the instance:
  
  ```
  # SSH as ubuntu user
  > ssh -i  <LOCATION_KEY>/<KEY_NAME>.pem ubuntu@<PUBLIC_DNS>
  # Move to tomcat user
  > sudo su - tomcat
  ```
  
  **Service Health**
  
  All services are started using System V init scripts, and so the status of the service can be retrieved:
  
  * Kill Bill server: `service killbill status`
  * KAUI server: `service kaui status`
  * Nginx server: `service nginx status`
  
  Similarly one can `start`, `stop` the services using simalar command -- e.g `service kaui stop` to stop KAUI.
  
  In order to verify the health of the Kill Bill server instance, you can issue the following commands:
  
  * Healthcheck endpoint: `curl http://127.0.0.1:8080/1.0/healthcheck`
  * System info: `curl -u admin:password http://127.0.0.1:8080/1.0/kb/nodesInfo`
  
  **Log Files**
  
  Tomcat logs are under `/var/lib/tomcat/logs/`:
  
  
negative.code:   --database-host=127.0.0.1:3306
  
  ...
  The diagnostic data is exported under /tmp/killbill-diagnostics-20200213-23204-u93ah5/killbill-diagnostics-02-13-20.zip 
  ```
  
  === Databases
  
  To access the mysql (MariaDB) databases, you can use the following command:
  
  ```
  mysql -u root -proot
  ```
  
  This enables interactive access to the database manager. There is one `killbill` and one `kaui` database created and used by the respective applications. To verify the tables in each database, you can type:
  
  ```
  use killbill;
  show tables;
  ```
  or
  
  ```
  use kaui;
  show tables;
  ```
  
  Standard SQL commands can be used to explore or manipulate the tables. Be sure you know what you are doing, or the databases may become corrupted!
  
  To exit the mysql interactive mode, type `exit`.
  
  
  **Nginx**
  