Ubuntu、centos系统下安装 Docker

    sudo apt-get update
    sudo apt-get install -y     apt-transport-https     a-certificates curl software-properties-common
    curl -fsSL https://download.daocloud.io/docker/linux/ubuntu/gpg | sudo apt-key add -
    sudo add-apt-repository             "deb [arch=$(dpkg --print-architecture)] https://download.daocloud.io/docker/linux/ubuntu             $(lsb_release -cs)     stable"
    sudo apt-get update
    sudo apt-get install -y -q docker-ce=*
    sudo service docker start
    sudo service docker status

在 CentOS中安装 Docker
在终端中运行命令安装 Docker。

    sudo yum install -y yum-utils
    sudo yum-config-manager --add-repo https://download.daocloud.io/docker/linux/centos/docker-ce.repo
    sudo yum install -y -q  docker-ce-.ce* docker-ce-selinux-.ce*
    sudo systemctl enable docker
    sudo systemctl start docker
    sudo service docker status

Ubuntu、centos系统下安装 Docker

原文：https://blog.51cto.com/11353391/2484621