@@ -505,6 +505,25 @@ Let's see our new tag using the `docker images` command.

     ouruser/sinatra     devel   5db5f8471261  11 hours ago   446.7 MB

     ouruser/sinatra     v2      5db5f8471261  11 hours ago   446.7 MB

+## Image Digests

+

+Images that use the v2 or later format have a content-addressable identifier

+called a `digest`. As long as the input used to generate the image is

+unchanged, the digest value is predictable. To list image digest values, use

+the `--digests` flag:

+

+    $ docker images --digests | head

+    REPOSITORY                         TAG                 DIGEST                                                                     IMAGE ID            CREATED             VIRTUAL SIZE

+    ouruser/sinatra                    latest              sha256:cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf    5db5f8471261        11 hours ago        446.7 MB

+

+When pushing or pulling to a 2.0 registry, the `push` or `pull` command

+output includes the image digest. You can `pull` using a digest value.

+

+    $ docker pull ouruser/sinatra@cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf

+

+You can also reference by digest in `create`, `run`, and `rmi` commands, as well as the

+`FROM` image reference in a Dockerfile.

+

 ## Push an image to Docker Hub

 Once you've built or created a new image you can push it to [Docker