yum 源配置

阿里元鏡像網：https://opsx.alibaba.com/mirror

首先先配置yum源

先備份一下yum源

#mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

下載新的CentOS-Base.repo 到/etc/yum.repos.d/

CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 
或者：curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、之後運行

# yum clean all

#yum makecache生成緩存