# 下载安装脚本
$ curl -fsSL https://get.docker.com -o get-docker.sh

# 执行脚本，使用阿里镜像
$ sudo sh get-docker.sh  --mirror Aliyun

$ sudo systemctl enable docker
$ sudo systemctl start docker# 带sudo，docker需要root权限
$ sudo docker version# 打印出来的版本信息
Client: Docker Engine - CommunityVersion:           19.03.5API version:       1.40Go version:        go1.12.12Git commit:        633a0eaBuilt:             Wed Nov 13 07:37:22 2019OS/Arch:           linux/armExperimental:      falseServer: Docker Engine - CommunityEngine:Version:          19.03.5API version:      1.40 (minimum version 1.12)Go version:       go1.12.12Git commit:       633a0eaBuilt:            Wed Nov 13 07:31:17 2019OS/Arch:          linux/armExperimental:     falsecontainerd:Version:          1.2.10GitCommit:        b34a5c8af56e510852c35414db4c1f4fa6172339runc:Version:          1.0.0-rc8+devGitCommit:        3e425f80a8c931f88e6d94a8c831b9d5aa481657docker-init:Version:          0.18.0GitCommit:        fec3683

$ mkdir -p /etc/docker
$ sudo tee /etc/docker/daemon.json <<-'EOF'
> {
>   "registry-mirrors":["https://docker.mirrors.ustc.edu.cn"]
> }
> EOF

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker

$  sudo docker run arm32v7/hello-worldUnable to find image 'arm32v7/hello-world:latest' locally
latest: Pulling from arm32v7/hello-world
latest: Pulling from arm32v7/hello-world
c1eda109e4da: Pull complete
Digest: sha256:07e995a680212a0a8a01e181b3fff128d44b8fe0c11426b638ec3cde7273f0a3
Status: Downloaded newer image for arm32v7/hello-world:latestHello from Docker!
This message shows that your installation appears to be working correctly.