Learning docker

gistfile1.txt

{
  "architecture": "amd64",
  "author": "NGINX Docker Maintainers \"docker-maint@nginx.com\"",
  "config": {
    "Hostname": "609b1a101af3",
    "Domainname": "",
    "User": "",
    "AttachStdin": false,
    "AttachStdout": false,
    "AttachStderr": false,
    "Tty": false,
    "OpenStdin": false,
    "StdinOnce": false,
    "Env": [
      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
      "NGINX_VERSION=1.9.9-1~jessie"
    ],
    "Cmd": [
      "/bin/bash"
    ],
    "Image": "146400830f31978e5b1517b84623eda0e9de0089519bc4b731579e583f7a4364",
    "Volumes": null,
    "WorkingDir": "",
    "Entrypoint": null,
    "OnBuild": [
      
    ],
    "Labels": null
  },
  "container": "ab15cd3282ba1cb987c1b2de2d0a699ba4c0930f57a45cbfa16c751f360f8f81",
  "container_config": {
    "Hostname": "609b1a101af3",
    "Domainname": "",
    "User": "",
    "AttachStdin": false,
    "AttachStdout": false,
    "AttachStderr": false,
    "Tty": false,
    "OpenStdin": false,
    "StdinOnce": false,
    "Env": [
      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
      "NGINX_VERSION=1.9.9-1~jessie"
    ],
    "Cmd": [
      "/bin/sh",
      "-c",
      "#(nop) ENV NGINX_VERSION=1.9.9-1~jessie"
    ],
    "Image": "146400830f31978e5b1517b84623eda0e9de0089519bc4b731579e583f7a4364",
    "Volumes": null,
    "WorkingDir": "",
    "Entrypoint": null,
    "OnBuild": [
      
    ],
    "Labels": null
  },
  "created": "2015-12-16T17:28:17.794372273Z",
  "docker_version": "1.8.3",
  "layer_id": "sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4",
  "os": "linux",
  "parent_id": "sha256:f5bb1dddc876c8e746cdf91bfd5858885e993a17eb5dd0e4d0d335f1713da42e"
}

var_lib_docker_repositories-aufs

{
  "Repositories": {
    "hello-world": {
      "latest": "0a6ba66e537a53a5ea94f7c6a99c534c6adb12e3ed09326d4bf3b38f7c3ba4e7"
    },
    "nginx": {
      "latest": "5328fdfe9b8e0c5a19a0773f3e29f9002d444f86521f8f61f3fcb8216ad5287a"
    },
    "ubuntu": {
      "latest": "89d5d8e8bafb6e279fa70ea444260fa61cc7c5c7d93eff51002005c54a49c918"
    }
  }
}