|Using Tags and Filters / Tagging and Filtering Overview|
You can search and filter resources based on the tags you use. For example, you can list a Eucalyptus Machine Image (EMI) using euca-describe-images, and you can list instances using euca-describe-instances.
Results from describe commands can be long. Use a filter to include only the resources that match certain criteria. For example, you can filter so that a returned list shows only the 64-bit Windows EMIs that use an EBS volume as the root device volumes.
Filtering also allows you to:
In each case, the instance must match all your filters to be included in the results. Filter values are case sensitive. We support only exact string matching, or substring matching (with wildcards).