在当我们安装centos6.4而又不能联网时，那么我们的yum命令是用不了的，这是我们可以配置本地源使用yum命令

  1.配置repo文件，
   cd /etc/yum.repos.d
   备份好原有的配置文件
   mv CentOS-Base.repo CentOS-Base.repo.bak
   mv  CentOS-Debuginfo.repo  CentOS-Debuginfo.repo.bak
   mv  CentOS-Vault.repo CentOS-Vault.repo.bak
   mv  CentOS-Media.repo CentOS-Media.repo.bak

   创建新的配置文件 vim CentOS-Debuginfo.repo 

[debug]
name=centos
baseurl=file:///mnt
enabled=1
gpgcheck=0
gpgkey=file:///mnt/RPM-GPG-KEY-redhat-release
  
  :wq 保存

  2.配置yumRepo.py文件，
   
   cd /usr/lib/python2.6/site-packages/yum
   vim yumRepo.py

  将   remote = url + ‘/’ + relative  
  改为   remote = "/mnt" + '/' + relative

  :wq 保存修改

  3 配置iso挂载文件

  mount /dev/cdrom /mnt

  4 验证测试(使用vsftpd)
  rpm -qa |grep vsftpd
  yum list |grep vsftpd

[root@hsj2 yum]# yum list |grep vsftpd
vsftpd.i686                              2.2.2-11.el6_3.1                  @debug

  yum install  vsftpd.i686 

[root@hsj2 yum]# yum install vsftpd.i686
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
Setting up Install Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
--> Running transaction check
---> Package vsftpd.i686 0:2.2.2-11.el6_3.1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=================================================================================================================
 Package                 Arch                  Version                              Repository              Size
=================================================================================================================
Installing:
 vsftpd                  i686                  2.2.2-11.el6_3.1                     debug                  157 k

Transaction Summary
=================================================================================================================
Install       1 Package(s)

Total download size: 157 k
Installed size: 344 k
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:
glibc-2.12-1.107.el6_4.4.i686 is a duplicate with glibc-2.12-1.107.el6.i686
glibc-common-2.12-1.107.el6_4.4.i686 is a duplicate with glibc-common-2.12-1.107.el6.i686
  Installing : vsftpd-2.2.2-11.el6_3.1.i686                                                                  1/1
  Verifying  : vsftpd-2.2.2-11.el6_3.1.i686                                                                  1/1

Installed:
  vsftpd.i686 0:2.2.2-11.el6_3.1

Complete!

  验证ok，成功