一，配置本地yum

1，挂载光盘

mount /dev/cdrom /mnt/media

2,新建本地yun源的配置文件
vi /etc/yum.repos.d/local.repo
加入以下信息：

[Local]
name=Local
baseurl=file:///mnt/media
enable=1
gpgcheck=0
 

二，配置第三方yum

1.删除redhat 原有的yum
rpm -aq|grep yum|xargs rpm -e --nodeps

2.下载yum 安装文件
wget -c http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm
wget -c http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm
wget -c http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
wget -c http://mirrors.163.com/centos/6.4/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

3.安装yum 软件包
(1)rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
(2)rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
(3) 两个一起安装先后顺序不要乱(中间50%正常)
    rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

4.repo 文件
(1)清空yum仓库
   rm -rf *
(2)http://mirrors.163.com/.help/CentOS6-Base-163.repo   进行修改
将所有$releasever 改为你的版本号6.4，不改也可以，但是查找的慢，有时候会报错，最好对应了版本如此处是6.4。vim /etc/yum.repos.d/server.repo保存退出。

##############################################################################################################

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-6.4 - Base - 163.com
baseurl=http://mirrors.163.com/centos/6.4/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-6.4 - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6.4/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-6.4 - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6.4/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6.4 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6.4/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-6.4 - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6.4/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.4&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6


#################################################################################################################

5.测试
  先清缓存   yum clean all
  再更新缓存 yum makecache
  升级软件包 yum update
  尝试安装软件 yum -y install screen