The Amazon EC2 console provides a Launch More Like This wizard option that enables you to use a current instance as a template for launching other instances. This option automatically populates the Amazon EC2 launch wizard with certain configuration details from the selected instance.
Most important thing
The Launch More Like This wizard option does not clone your selected instance; it only replicates some configuration details.
To create a copy of your instance, first create an AMI from it, then launch more instances from the AMI.
What's Launch More Like This ?
The Amazon EC2 console provides a Launch More Like This wizard option that enables you to use a current instance as a template for launching other instances. This option automatically populates the Amazon EC2 launch wizard with certain configuration details from the selected instance.
Most important thing
How ?
Check http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/launch-more-like-this.html