yum源配置

阿里云源

1) 安装wget

yum install -y wget

2) 备份/etc/yum.repos.d/CentOS-Base.repo文件

cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.back

3) 下载阿里云的Centos-7.repo文件

wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

4) 重新加载yum

yum clean all
yum makecache