• https://blog.gruntwork.io/an-introduction-to-terraform-f17df9c6d180
• http://cloudinit.readthedocs.io/en/latest/topics/examples.html
• https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html
• https://aws.amazon.com/premiumsupport/knowledge-center/execute-user-data-ec2/
• https://aws.amazon.com/premiumsupport/knowledge-center/ec2-user-account-cloud-init-user-data/

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#cloud-config
cloud_final_modules:
- [scripts-user, always]

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#!/bin/bash
/bin/echo "Hello World." >> /tmp/sdksdfjsdlf
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