Centos7 設置yum源

yum install epel-release
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all
yum makecache
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作者：煜銘2011 
來源：CSDN 
原文：https://blog.csdn.net/qq_29277155/article/details/53205582 
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