docker history

Usage:  docker history [OPTIONS] IMAGE

Show the history of an image

Options:
      --help       Print usage
  -H, --human      Print sizes and dates in human readable format (default true)
      --no-trunc   Don't truncate output
  -q, --quiet      Only show numeric IDs

To see how the docker:latest image was built:

$ docker history docker
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
3e23a5875458        8 days ago          /bin/sh -c #(nop) ENV LC_ALL=C.UTF-8            0 B
8578938dd170        8 days ago          /bin/sh -c dpkg-reconfigure locales &&    loc   1.245 MB
be51b77efb42        8 days ago          /bin/sh -c apt-get update && apt-get install    338.3 MB
4b137612be55        6 weeks ago         /bin/sh -c #(nop) ADD jessie.tar.xz in /        121 MB
750d58736b4b        6 weeks ago         /bin/sh -c #(nop) MAINTAINER Tianon Gravi <ad   0 B
511136ea3c5a        9 months ago                                                        0 B                 Imported from -

To see how the docker:apache image was added to a container’s base image:

$ docker history docker:scm
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
2ac9d1098bf1        3 months ago        /bin/bash                                       241.4 MB            Added Apache to Fedora base image
88b42ffd1f7c        5 months ago        /bin/sh -c #(nop) ADD file:1fd8d7f9f6557cafc7   373.7 MB
c69cab00d6ef        5 months ago        /bin/sh -c #(nop) MAINTAINER Lokesh Mandvekar   0 B
511136ea3c5a        19 months ago                                                       0 B                 Imported from -