DOCKER_VERSION=20.10.10 URL=https://mirrors.aliyun.com prepare(){ if[!-edocker-${DOCKER_VERSION}.tgz];then wget${URL}/docker-ce/linux/static/stable/x86_64/docker-${DOCKER_VERSION}.tgz fi [$?-ne0]&&{echo"文件下载失败";exit;} } install_docker(){ tarxfdocker-${DOCKER_VERSION}.tgz-C/usr/local/ cp/u...