9 of 29Image
When you provisioned your AWS account, you should have created at least one EC2 key pair. Pick one for your EMR cluster. Without it, you won't be able to establish a secure terminal session and work interactively with Hadoop. Once you've selected a key pair, click Continue.
You needn't worry about bootstrap actions, so just click Continue through this screen.
In the Review screen, confirm that your instance types, instance counts and key pair configuration are all correct. If not, click the Back link and amend your settings as appropriate. Once everything is correctly configured, click Create Job Flow.