Finding all Amazon AWS Instances That Do Not Have a Certain Tag

Question

I\'m trying to use the Amazon AWS Command Line Tools to find all instances that do not have a specified tag.

Finding all instances WITH a tag is simple enough, e.g.<

Answer 1

AFAIK directly through the CLI you won't be able to do that.

By the syntax you are using, I can guess you are using the old cli. I suggest you to download the new CLI http://aws.amazon.com/cli/ and call

aws ec2 describe-instances --output json

from python, ruby or any scripting language you may like to parse the json output filtering using the proper regular expression according to your needs