1 创建rhel-debuginfo.repo,如果有则先备份再删除
 cd  /etc/yum.repos.d
 rm  rhel-debuginfo.repo
 vi  rhel-debuginfo.repo 插入以下内容:
 [Server] 
 name=Red Hat Enterprise Linux Server 
 baseurl=file:///home/redhat-iso  #本地iso的挂载路径
 enabled=1       #可以使用yum
 gpgcheck=0      #设置不检查gpgkey 
 gpgkey=file:///home/redhat-iso/RPM-GPG-KEY-RedHat-release    
2 修改yumRepo.py配置文件
cd /usr/lib/python2.6/site-packages/yum/
vi yumRepo.py找到  remote = url + ‘/’ + relative  #802行 
改为  remote = "/home/redhat-iso" + ‘/‘ + relative
3 挂载iso文件
  mkdir /home/redhat-iso
  mount /dev/cdrom /mnt/cdrom或者:
mount -o loop /home/Soft/rhel-server-6.3-x86_64-dvd.iso /mnt/cdrom4 拷贝数据
cp /mnt/redhat-iso/* /home/redhat-iso5 测试 安装ftp 默认没有安装
 yum list | grep vsftpd原文地址:http://blog.csdn.net/kallen_ding/article/details/45537645