anchor.diff:  
   In addition, you can login to the Kill Bill server using the URL http://INSTANCE_IP:8443. This provides access to certain detailed reports that may be needed for maintenance, including metrics, event logs, and the Swagger API pages.
   
  -== Login to your Instance
  -
  -You have setup access to port 22 in your security group. This will allow you to login directly to your instance from a terminal or command window. You will need to do this to perform some maintenance tasks that will be described below.
  +== Login
  +
  +You have setup access to port 22 in your security group. This will allow you to login directly to your instance from a terminal or command window. You may need to do this to perform some configuration and maintenance tasks that will be described below.
   
   To login, use the secure shell command:
   
  
positive.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.
  
  == Upgrades
  
  From time to time new versions of Kill Bill and KAUI may be released. This section explains how to install these new versions in a production system with minimal disruption.
  
  First, login to your instance using `ssh`, then switch to the `tomcat` user: 
  
  `sudo su - tomcat`
  
  The configuration file `/var/lib/killbill/kpm.yml` specifies the Kill Bill version (and its plugins) running on the instance. Once you edit this file to specify the new version number, it will be used automatically. Perform the following steps:
  
  1. Edit the configuration file to update the version number
  2. Run the command `$KPM_INSTALL_KB_CMD`
  3. Delete the cached directory `/var/lib/tomcat/webapps/ROOT`
  4. Restart the instance.
  
  A similar process can be used for KAUI: update `/var/lib/kaui/kpm.yml`, run `$KPM_INSTALL_KAUI_CMD`, delete the cached directory `/var/lib/tomcat/webapps2/ROOT` and restart the instance.
  
negative.code: The first time you login, you will see a warning message asking if you want to add this host to your list of hosts. You should answer `yes`.
  
  You will now be able to explore your instance and perform various configuration and maintenance tasks. To exit from your login, type `exit`.
  
  
  == Using HTTPS
  