安装配置centos

修改yum源为阿里云

阿里云Linux安装镜像源地址:http://mirrors.aliyun.com/

第一步:备份原镜像文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak  

第二步:下载CentOS-Base.repo 到/etc/yum.repos.d/

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CentOS 5
wget -O /etc/yum.repos.d/CentOS-Base.repo http:
CentOS 6
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

第三步:运行yum makecache生成缓存

yum clean all

yum makecache

rpm --import /etc/pki/rpm-gpg/