1、ubuntu
sudo apt-get update
sudo apt-get install docker.io
2、centos
yum update
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager –add-repo https://download.docker.com/linux/centos/docker-ce.repo #官方
yum-config-manager –add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo #阿里云
yum list docker-ce –showduplicates | sort -r
sudo yum install docker-ce #由于repo中默认只开启stable仓库，故这里安装的是最新稳定版17.12.0
sudo yum install <FQPN> # 例如：sudo yum install docker-ce-17.12.0.ce
sudo systemctl start docker
sudo systemctl enable docker
#下载镜像
docker pull daocloud.io/centos:7
docker pull daocloud.io/ubuntu:18.04
docker pull daocloud.io/alpine
docker pull daocloud.io/debian
docker pull registry.docker-cn.com/library/ubuntu:18.04