Centos下替换yum源为阿里云源

替换yum源

阿里云Linux安装镜像源地址：http://mirrors.aliyun.com/
1、备份原镜像文件
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
2、下载CentOS-Base.repo
curl http://mirrors.aliyun.com/repo/Centos-7.repo > /etc/yum.repos.d/CentOS-Base.repo
3、清除和生成缓存
yum clean all
yum makecache

4、更新系统
yum -y update

常见问题：

一：遇到镜像无法下载的时候

Error Downloading Packages:

openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.

openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.

openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.

openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm from base: [Errno 256] No more mirrors to try.

解决方案：替换国外的源–>阿里源