> 本文作者：丁辉

# Centos7更换阿里源

1. 备份本地Yum源

   ```bash
   mkdir -p /etc/yum.repos.d/backup/
   mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/
   ```

2. 下载阿里云Yum源

   ```bash
   curl -O http://mirrors.aliyun.com/repo/Centos-7.repo
   curl -O http://mirrors.aliyun.com/repo/epel-7.repo
   ```

3. *删除缓存数据*

   ```bash
   yum clean all
   ```

4. *创建元数据缓存*

   ```bash
   yum makecache
   ```