title: Script for automation start and stop AWS EC2 instance
body: <p>I've installed Cloudera cluster on 4 nodes Amazon EC2 instance.
  For certain time such as Monday-Friday Night, Saturday, and Sunday, I didn't need to use those 4 nodes Amazon EC2 instance for more effective cost. </p>
  
  <p>How to automate start and stop an those Amazon EC2 instances using script?
  Could anybody give me the example of the script to do it?</p>
  
  <p>Thanks,</p>