centos7 修改为阿里的yum源

1.备份本地yum源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak 

2.获取阿里yum源配置文件

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 
wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo

3.更新cache

yum makecache 

4.安装

yum -y update 

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原文链接：https://blog.csdn.net/BigData_Mining/article/details/88568336