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.