CentOS7 yum

备份原有的YUM仓库配置文件

sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

下载阿里云的CentOS仓库配置文件

sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

清理缓存并生成新的仓库缓存

sudo yum clean all
sudo yum makecache

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