CentOS7.6的yum更换为国内的阿里云yum源
1.备份原有的yum库mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2.下载新的CentOS-Base.repo 到/etc/yum.repos.d/
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
3.添加EPEL
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
4.清理缓存并生成新的缓存
yum clean all
yum makecache
5.这样就安装完成了
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