Searching for images

To effectively search for a specific image, first we need to understand the Docker image naming schema and tags concept. We have already mentioned it before; let's look at it now in detail.

Image naming and tags

The full image name has the following syntax:

{registry_host}/(_|/{user_or_org_namespace})/{repository}:{tag} 

Let's explore it in detail, image names start with a namespace and a slash. For example, the image named hello-world created and uploaded by user tutum (which is an Apache image responding with hello-world message on port 80, by the way) will begin with this part: tutum/hello-world.

There can also be images with no namespace prefix-these will be images from the so-called official repositories. The official repositories ...

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