一、下载CentOS-Base-163.repo, 放入/etc/yum.repos.d/ wget http://mirrors.163.com/.help/CentOS-Base-163.repo -O /etc/yum.repos.d/CentOS-Base-163.repo缓存
二、删除缓存rm -rf /var/cache/yum/*ide
运行yum makecache生成缓存spa