Tagging AWS entities
I found this great source of information from Mark Russell on the ec2ubuntu Google group email list. I thought I would document/share it here.
If you are using EC2, you can assign tags to almost any kind of AWS resource including instances and images. Then when you run ec2-describe-{volumes, instances, images, etc.} you can get some human readable output! Of course they are also viewable out of the AWS web console.
Introduction to tagging from the Amazon Web Services blog:
http://aws.typepad.com/aws/2010/09/new-amazon-ec2-feature-resource-tagging.html
Official documentation:
http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/index.html?Using_Tags.html