CentOS7系统配置国内yum源和epel源

yum install wget

cd /etc/yum.repos.d/

mkdir repo_bak
mv *.repo repo_bak/

4、下载网易与阿里云的源

wget http://mirrors.aliyun.com/repo/Centos-7.repo
wget http://mirrors.163.com/.help/CentOS7-base-163.repo

5、清理并生成新的yum缓存

yum clean all # 清除系统所有的yum缓存
yum makecache       # 生成yum缓存

6、安装epel源

yum install -y epel-release
wget http://mirrors.aliyun.com/repo/epel-7.repo

7、清理并生成新的yum缓存

yum clean all # 清除系统所有的yum缓存
yum makecache       # 生成yum缓存

8、查看

yum repolist enabled  # 系统可用源
yum repolist all  # 所有源