AWS Systems Manager Change Manager is no longer open to new customers. Existing customers can continue to use the service as normal. For more information, see AWS Systems Manager Change Manager availability change.
Working with SSM Agent on EC2 instances for Linux
AWS Systems Manager Agent (SSM Agent) processes Systems Manager requests and configures your machine as specified in the request. Use the procedures in following topics to install, configure, or uninstall SSM Agent on Linux operating systems.