anchor.diff:  > sudo service killbill start
   ```
   
  -[5] Add the ELB in front of the EC2 instances
  +[6] Add the ELB in front of the EC2 instances
   
   
   == Configuration
  
positive.code: 
  cat <<_EOF > $KB_PROPS
  #
  # EDIT FOLLOWING KB PROPERTIES BELOW AS NEEDED
  #
  org.killbill.dontexist=foo
  _EOF
  
  su -l -c "cd /var/lib/tomcat/bin && /var/lib/tomcat/bin/updateProperties.sh $DB_PROPS $KB_PROPS" tomcat
  ```
  
  Specifying such user data script in the AWS UI is shown below:
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/userdata.png[align=center]
  
  
  Make sure that the security group for the EC2 instance also includes the security group for the RDS instance to ensure your EC2 instances can connect to RDS.
  
  [3] Install database schema
  
  In order to install the database schema, you will need to `ssh` to one EC2 instance using your private key -- make sure you have alowed incoming SSH traffic on port `22` in your security group.
  
  ```
  # SSH as ubuntu user
  
negative.code: > mysql -h db-instance-1.cah16olm8gkg.us-east-1.rds.amazonaws.com -u admin -p5Xn21rhxr3Km4jC7N7ol kaui < kaui.ddl
  ```
  
  [5] Stop and Restart the KillBill Service
  
  ```
  > sudo service killbill stop
  