$ sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
$
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
$ sudo apt-get update
$ sudo apt-get install docker-ce
$
$ sudo systemctl enable docker
$ sudo systemctl start docker

开机启动docker服务

sudo systemctl enable docker

配置官方给的国内镜像:修改 /etc/docker/daemon.json（没有则创建）

{
    "registry-mirrors": [
        "https://registry.docker-cn.com"
    ]
}

让配置生效

sudo systemctl restart docker

查看是否生效

docker info