1，        建立yum库文件夹：/var/ftp/pub/;

2，        将光盘中Server文件夹复制到yum库文件夹内，权限不做修改（RHEL5）；RHEL6将Server文件夹和Packages文件夹一起拷贝过去；

3，        找到createrepo的rpm包，使用rpm命令安装该文件包；RHEL6，需要先安装另外两个依赖文件：deltarpm-3.5-0.5.20090913git.el6.i686.rpm和python-deltarpm-3.5-0.5.20090913git.el6.i686.rpm；然后安装createrepo-0.9.8-4.el6.noarch.rpm；

4，        用命令createrepo建立repodata的索引文件：createrepo /var/ftp/pub/Server;

如果缺少这步，会报错无法继续向下执行下去如下：

---> Downloading header for yum-utils to pack into transaction set.
media://1192663619.181374%234/xxxxxxxxxx: [Errno 4] IOError: <urlopen error unknown url                                               type: media>
Trying other mirror.
Error: failed to retrieve yum-utils-1.0.4-3.el5.noarch.rpm from dvd-server
error was [Errno 4] IOError: <urlopen error unknown url type: media>

5，        建立yum源配置文件：vi /etc/yum.repos.d/base.repo

6，        将 /etc/yum.repos.d/ 下的原repo文件删除，不然的话，测试会报如下错误：

Error: Cannot retrieve repository metadata (repomd.xml) for repository: InstallMedia. Please verify its path and try again

7，        测试yum是否正常可用：yum clean all；yum makecache；yum install httpd；

 完成。