**To describe the running instances for an EC2 Fleet** The following ``describe-fleet-instances`` example describes the running instances for the specified EC2 Fleet. :: aws ec2 describe-fleet-instances \ --fleet-id 12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE Output:: { "ActiveInstances": [ { "InstanceId": "i-090db02406cc3c2d6", "InstanceType": "t2.small", "SpotInstanceRequestId": "sir-a43gtpfk", "InstanceHealth": "healthy" }, { "InstanceId": "i-083a1c446e66085d2", "InstanceType": "t2.small", "SpotInstanceRequestId": "sir-iwcit2nj", "InstanceHealth": "healthy" } ], "FleetId": "fleet-12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE" } For more information, see `Managing an EC2 Fleet <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/manage-ec2-fleet.html>`__ in the *Amazon Elastic Compute Cloud User Guide for Linux Instances*.