centos6.9虚拟机异常关闭 yum 命令提示no such table: packages

问题:

# yum update
已加载插件：fastestmirror
设置更新进程
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
错误：no such table: packages

解决方法:

# yum clean all
已加载插件：fastestmirror
Cleaning repos: base extras nginx packages-microsoft-com-prod updates
清理一切
Cleaning up list of fastest mirrors

只是记录一下操作过程,不懂原理.