Command to stop an EC2 Instance:
aws ec2 stop-instances --instance-ids INSTANCEID
Command to start an EC2 Instance:
aws ec2 start-instances --instance-ids INSTANCEID
Command to reboot an EC2 Instance
aws ec2 reboot-instances --instance-ids INSTANCEID
Command to terminate an EC2 Instance:
aws ec2 terminate-instances --instance-ids INSTANCEID
To perform action on multiple Instances, all the above 4 commands accept space separated list of Instance IDs as below:
--instance-ids INSTANCEID1 INSTANCEID2 INSTANCEID3