下载centos镜像https://raw.githubusercontent.com/CentOS/sig-cloud-instance-images/a77b36c6c55559b0db5bf9e74e61d32ea709a179/docker/centos-7-docker.tar.xz安装Chocolatey2.1 管理员方式打开cmd.exe或poerShell.execmd:@"%Sy