AWS EC2 and Digital Ocean UserData
Userify Express, AWS, and Enterprise have built in CloudInit/UserData support. (You can also use the Instant Deployment script that is available on free platforms, but because those links expire, they cannot be used to build Autoscaling Groups.)
This allows compatible platforms, such as EC2, Digital Ocean, Rackspace, and most OpenStack derivatives, to run a script upon server boot. This is most useful when used with CloudFormation, which allows you to kick off an entire "application stack" within a single script, but it can be quite useful when launching a single instance or autoscaling group as well.
To deploy Userify in seconds at EC2 without ever logging into your instance, paste your custom Userify CloudInit/UserData script when launching your instance in the AWS console, or via the SDK/API/aws-cli:
Similarly, to deploy Userify in seconds at Digital Ocean without ever logging into your droplet, paste your customized Userify CloudInit/UserData script when launching your droplet: