官方镜像下载地址： http://120.52.51.19/isoredirect.centos.org/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1810.iso 安装步骤说明： https://www.osyunwei.com/archives/7829.html https://blog.csdn.net/luanpeng825485697/article/details/80274399