1. 备份 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/ CentOS 6 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo curl -o /etc/yum.repos.d/CentOS-Base.r...