aws ec2 purchase-capacity-block
Purchase the Capacity Block for use with your account. AWS CLI reference
4 options Its page in the AWS CLI reference
Options
--capacity-block-offering-idThe ID of the Capacity Block offering.--dry-runChecks whether you have the required permissions for the action, without actually making the request, and provides an error response.--instance-platformThe type of operating system for which to reserve capacity.--tag-specificationsThe tags to apply to the Capacity Block during launch.