centos7配置网易yum源

部分参考centos6：

https://blog.csdn.net/jinzhencs/article/details/53673999

下载yum：  https://www.cnblogs.com/catlee/p/7417680.html

1）下载repo文件 

wget  http://mirrors.163.com/.help/CentOS7-Base-163.repo

修改

vi CentOS7-Base-163.repo
:%s/$releasever/7/g