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 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 upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Disable the repository, so yum won use it by default. Yum will then
just ignore the repository until you permanently enable it again or use
--enablerepo for temporary usage:
yum-config-manager --disable
4. Configure the faili
