title: Compare Linux application file system between 2 AWS EC2 instances
body: <p>We have a Java based application running in Linux EC2 instances. We have different components running in different EC2 instances. </p>
  
  <p>Every month we go for an AMI upgrade by creating new instances, deploying the code and killing the old instances. We are facing challenge in making sure that all components are deployed successfully in the instances.</p>
  
  <p>Are there tools to get a snapshot of the application file system from old instance before AMI upgrade and compare it with the snapshot taken from new instance after code deployment? </p>
  
  <p>If so that will make our work easier. We have a tool of 8 instances running the application.</p>