备份系统自带源mv/etc/yum.repos.d/CentOS-Base.repo/etc/yum.repos.d/CentOS-Base.repo.backup下载新的CentOS-Base.repo到/etc/yum.repos.d/CentOS5wget-O/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-5.repo或者curl-o/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-5.repoCentOS6wget-O/etc/yum.repos.d/CentOS-Base。repohttp://mirrors.aliyun.com/repo/Centos-6.repo或curl-o/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-6.repoCentOS7wget-O/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-7.repo或curl-o/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-7.repo然后运行yummakecache生成缓存备注：文章来源阿里云开发者社区https://developer.aliyun.com/...
