Centos 7 无法使用yum命令解决方法
Centos 7 无法使用yum命令解决方法前言在刚安装完Centos系统的时候可能会出现yum命令无法使用的情况,情况如下One of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstre...