name : update-system-template.rst **To update a system** The following ``update-system-template`` example updates a system. The value of ``MySystemDefinition`` is the GraphQL that models the system. :: aws iotthingsgraph update-system-template \ --id "urn:tdm:us-west-2/123456789012/default:System:MySystem" \ --definition language=GRAPHQL,text="MySystemDefinition" Output:: { "summary": { "createdAt": 1559249776.254, "id": "urn:tdm:us-west-2/123456789012/default:System:MySystem", "arn": "arn:aws:iotthingsgraph:us-west-2:123456789012:System/default/MySystem", "revisionNumber": 2 } } For more information, see `Creating Systems <https://docs.aws.amazon.com/thingsgraph/latest/ug/iot-tg-sysdeploy-systems.html>`__ in the *AWS IoT Things Graph User Guide*.