You can obtain information about EC2 instances using:
aws ec2 describe-instances
You can obtain information about specific EC2 instances using:
aws ec2 describe-instances --instance-ids ...
where ...
contains one or more instance identifiers. For example:
aws ec2 describe-instances --instance-ids i-abcdefgh i-ijklmnop
The output of aws ec2 describe-instances
uses pagination by default. If the response contains the key "NextToken"
then you'll need to use that token to obtain the next page of information:
aws ec2 describe-instances --starting-token <token from previous response>