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

You can do that with jmespath (the engine that drives the --query parameter) despite what others say:

aws ec2 describe-instances \
  --query 'Reservations[].Instances[?!not_null(Tags[?Key == `Name`].Value)] | []'

^{Source: Using Amazon Web Services Command Line Interface (AWS CLI) to Find Instances without a 'Name' Tag.}