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**Example 1: To list the registered task definitions**
The following ``list-task-definitions`` example lists all of the registered task definitions. ::
aws ecs list-task-definitions
Output::
{
"taskDefinitionArns": [
"arn:aws:ecs:us-west-2:123456789012:task-definition/sleep300:2",
"arn:aws:ecs:us-west-2:123456789012:task-definition/sleep360:1",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:3",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:4",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:5",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:6"
]
}
**Example 2: To list the registered task definitions in a family**
The following `list-task-definitions` example lists the task definition revisions of a specified family. ::
aws ecs list-task-definitions --family-prefix wordpress
Output::
{
"taskDefinitionArns": [
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:3",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:4",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:5",
"arn:aws:ecs:us-west-2:123456789012:task-definition/wordpress:6"
]
}
For more information, see `Amazon ECS Task Definitions <https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definitions.html>`_ in the *Amazon ECS Developer Guide*.