Trigger a Cloudwatch alarm using AWS CLI
Here are the steps on how to trigger or test an Amazon CloudWatch alarm using the AWS CLI
How to attach or change a security group on an EC2 instance
This article shows the steps that allow you to add a security group to a running EC2 instance in the AWS Console and AWS CLI
How to list all active AWS resources in a VPC
This blog post shows how to find and list all AWS resources that belong to a certain Amazon VPC in an AWS account