How to change AMI on same instance
amazon-ec2
Solution
You cannot update the `AMI` on an existing instance in AWS. The only way to do that is to terminate the current instance and relaunch the instances with the desired the `AMI`
Background
`AMI` is a special type of virtual appliance that is used to instantiate (create) a virtual machine within the Amazon Elastic Compute Cloud ("EC2") and I always refer to it as `.iso` image file.
Now I can use an `.iso` image file of a particular OS say Ubuntu to install it on a partition of my choice and if I want to change the OS on that partition then only way for me to do is by formatting that partition and installing a new OS from its `.iso` image file.
Problem
I have a free micro instance launched in AWS EC2, I want to change the instance's OS to Cent OS. How would I be able to change the AMI <- (OS Image) of the instance? Edit (Solved): Terminated existing instance and launched a new one.