$sudo apt-get update
$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
$apt-cache policy docker-ce
$sudo apt-get install -y docker-ce
$sudo systemctl status docker #查看docker的状态
$sudo docker version #查看docker版本国内源：https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg
相关链接：https://docs.docker.com/intall