1：查看镜像列表

2：拉取镜像

   通过命令可以从镜像仓库中拉取镜像，默认从Docker Hub 获取。

   命令格式：

   docker image pull :

  拉取ubuntu仓库,标签为 latest 的镜像，如果省略标签，则docker 会拉取标签为latest的镜像。获取非官方镜像的命令类似，例如：

  docker image pull microsoft/dotnet:latest  

  docker image pull -a  nigelpoulton/tu-demo    //添加 -a 参数可以拉取仓库中所有镜像

3：docker image ls 详解

     docker image ls --filter [dangling|before|since|lable|reference]

     dangling: 值为true或false,true 仅返回悬虚镜像，false仅返回非悬虚镜像。悬虚镜像：指没有标签的镜像。

  before：需要镜像名或镜像ID作为参数，返回之前创建的全部镜像。

since:需要镜像名或镜像ID作为参数，返回之后创建的全部镜像。

lable:根据标注的名称或值过滤。略

reference:根据repository和tag搜索，貌似*只能搜一级空间的镜像

4：搜索镜像

 按照官方或非官方过滤，使用 --filter "is-official=true|false"

 docker search ubuntu --filter "is-official=true"  //只显示官方镜像

 显示是否为自动创建的镜像

 docker search ubuntu --filter "is-automated=true"  //只自动创建的仓库

5：查看镜像分层

    输入命令：docker image inspect ubuntu:latest

    输出：

    [    {        "Id": "sha256:3556258649b2ef23a41812be17377d32f568ed9f45150a26466d2ea26d926c32",        "RepoTags": [            "ubuntu:latest"        ],        "RepoDigests": [            "ubuntu@sha256:c303f19cfe9ee92badbbbd7567bc1ca47789f79303ddcef56f77687d4744cd7a"        ],        "Parent": "",        "Comment": "",        "Created": "2019-07-23T15:21:13.01464074Z",        "Container": "3b0e1c94bfe8f2670577cad66142287be14f02c7e49e9d1710073f6b8733bb48",        "ContainerConfig": {            "Hostname": "3b0e1c94bfe8",            "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"            ],            "Cmd": [                "/bin/sh",                "-c",                "#(nop) ",                "CMD [\"/bin/bash\"]"            ],            "ArgsEscaped": true,            "Image": "sha256:6dd4850db8211ac5177f2729ad131f65d6472e95248c92b7fb95acfc609794e7",            "Volumes": null,            "WorkingDir": "",            "Entrypoint": null,            "OnBuild": null,            "Labels": {}        },        "DockerVersion": "18.06.1-ce",        "Author": "",        "Config": {            "Hostname": "",            "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"            ],            "Cmd": [                "/bin/bash"            ],            "ArgsEscaped": true,            "Image": "sha256:6dd4850db8211ac5177f2729ad131f65d6472e95248c92b7fb95acfc609794e7",            "Volumes": null,            "WorkingDir": "",            "Entrypoint": null,            "OnBuild": null,            "Labels": null        },        "Architecture": "amd64",        "Os": "linux",        "Size": 64185514,        "VirtualSize": 64185514,        "GraphDriver": {            "Data": {                "LowerDir": "/mnt/sda1/var/lib/docker/overlay2/a6003e3ac734728a7ac69eb19453892ad619d1d23f246730c1c59e542f1277c6/diff:/mnt/sda1/var/lib/docker/overlay2/25fc962c359839b2565d1208e2558fa0afd676529ee4b18c87e9346466159feb/diff:/mnt/sda1/var/lib/docker/overlay2/5cc4ecda8dabb8415a0e316a09326a04414e5aefe7a5ee885f6af52838ddce91/diff",                "MergedDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/merged",                "UpperDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/diff",                "WorkDir": "/mnt/sda1/var/lib/docker/overlay2/70dbca5fd3a27da47ff110d91b1b146a905b8e741871db773bfb6a5dc65299e3/work"            },            "Name": "overlay2"        },        "RootFS": {            "Type": "layers",            "Layers": [                "sha256:543791078bdb84740cb5457abbea10d96dac3dea8c07d6dc173f734c20c144fe",                "sha256:c56e09e1bd18e5e41afb1fd16f5a211f533277bdae6d5d8ae96a248214d66baf",                "sha256:a31dbd3063d77def5b2562dc8e14ed3f578f1f90a89670ae620fd62ae7cd6ee7",                "sha256:b079b3fa8d1b4b30a71a6e81763ed3da1327abaf0680ed3ed9f00ad1d5de5e7c"            ]        },        "Metadata": {            "LastTagTime": "0001-01-01T00:00:00Z"        }    }]

在json节点RootFS可以看出ubuntu镜像有四层

 6：删除镜像

 参考书目《深入浅出Docker》    

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