name : modify-ebs-default-kms-key-id.rst **To set your default CMK for EBS encryption** The following ``modify-ebs-default-kms-key-id`` example sets the specified CMK as the default CMK for EBS encryption for your AWS account in the current Region. :: aws ec2 modify-ebs-default-kms-key-id \ --kms-key-id alias/my-cmk Output:: { "KmsKeyId": "arn:aws:kms:us-west-2:123456789012:key/0ea3fef3-80a7-4778-9d8c-1c0c6EXAMPLE" }