**To describe a task definition** The following ``describe-task-definition`` example retrieves the details of a task definition. :: aws ecs describe-task-definition --task-definition hello_world:8 Output:: { "taskDefinition": { "volumes": [], "taskDefinitionArn": "arn:aws:ecs:us-west-2:123456789012:task-definition/hello_world:8", "containerDefinitions": [ { "environment": [], "name": "wordpress", "links": [ "mysql" ], "mountPoints": [], "image": "wordpress", "essential": true, "portMappings": [ { "containerPort": 80, "hostPort": 80 } ], "memory": 500, "cpu": 10, "volumesFrom": [] }, { "environment": [ { "name": "MYSQL_ROOT_PASSWORD", "value": "password" } ], "name": "mysql", "mountPoints": [], "image": "mysql", "cpu": 10, "portMappings": [], "memory": 500, "essential": true, "volumesFrom": [] } ], "family": "hello_world", "revision": 8 } } For more information, see `Amazon ECS Task Definitions `_ in the *Amazon ECS Developer Guide*.