yum makecache 已加载插件：fastestmirror, langpacks Loading mirror speeds from cached hostfile file:///etc/cdrom/base/repodata/repomd.xml: [Errno 14] curl#37 - "Couldn't open file /etc/cdrom/base/repodata/repomd.xml"

yum makecache命令已加载“fastestmirror”和“langpacks”插件。从缓存的主机文件加载镜像速度。但在访问文件“/etc/cdrom/base/repodata/repomd.xml”时出现错误，错误代码为[Errno 14] curl。