linux 下yum源配置，

1.确保RHEL5中已经安装了yum

[root@lvs-master ~]# rpm -qa |grep yum

yum-metadata-parser-1.1.2-3.el5

yum-updatesd-0.9-2.el5

yum-3.2.22-26.el5

yum-security-1.1.16-13.el5

yum-rhn-plugin-0.5.4-15.el5

2.修改源配置文件 ＃vim /etc/yum.repos.d/CentOS-Base.repo

[base]

name=CentOS-5-Base

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever5&arch=$basearch&repo=os

#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/

baseurl=http://ftp.sjtu.edu.cn/centos/5/os/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#released updates

[update]

name=CentOS-5-Updates

#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=updates

baseurl=http://ftp.sjtu.edu.cn/centos/5/updates/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#packages used/produced in the build but not released

[addons]

name=CentOS-5-Addons

#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=addons

baseurl=http://ftp.sjtu.edu.cn/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that may be useful

[extras]

name=CentOS-5-Extras

#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=extras

baseurl=http://ftp.sjtu.edu.cn/centos/5/extras/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-5-Plus

#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=centosplus

baseurl=http://ftp.sjtu.edu.cn/centos/5/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#contrib - packages by Centos Users

[contrib]

name=CentOS-5-Contrib

#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=contrib

baseurl=http://ftp.sjtu.edu.cn/centos/5/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

# vi dag.repo

[dag]

name=Dag RPM Repository for RHEL5

baseurl=http://ftp.riken.jp/Linux/dag/redhat/el5/en/$basearch/dag/

enabled=1

gpgcheck=1

gpgkey=http://ftp.riken.jp/Linux/dag/packages/RPM-GPG-KEY.dag.txt

3. 导入key

　＃rpm --import http://ftp.sjtu.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5
4. 运行，测试

　＃yum update

5.#yum clean all

方法二：

# cd /etc/yum.repos.d/

#mv CentOS-Base.repo CentOS-Base.repo.bak

#wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo
该文件内容如下：

[base]

name=CentOS-5 - Base

baseurl=http://centos.ustc.edu.cn/centos/5/os/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-5 - Updates

baseurl=http://centos.ustc.edu.cn/centos/5/updates/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5 - Addons

baseurl=http://centos.ustc.edu.cn/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-5 - Extras

baseurl=http://centos.ustc.edu.cn/centos/5/extras/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-5 - Plus

baseurl=http://centos.ustc.edu.cn/centos/5/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users

[contrib]

name=CentOS-5 - Contrib

baseurl=http://centos.ustc.edu.cn/centos/5/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#packages in testing

[testing]

name=CentOS-5 - Testing

baseurl=http://centos.ustc.edu.cn/centos/5/testing/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

第三种

redhat6.4配置centos6 yum替换

1、卸载掉系统redhat自带的yum
rpm -qa |grep yum |xargs rpm -e --nodeps

2
下载相关的centos yum插件
主要有python-iniparse-0.3.1-2.1.el6.noarch.rpm
yum-3.2.29-40.el6.centos.noarch.rpm
yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

其中版本号和安装的系统版本，以及时32位系统和64位系统有关系
下载地址：http://mirrors.163.com/centos/

在linux可以使用命令直接下载到本地也可以
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm
注意：如果下载不了可能是小版本号有变化，可以直接下载后在上传到linux服务器

3 安装下载的yum包（如果没权限可以先修改权限 chmod 777 *）

rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

最后两个需要一起安装，有相互依赖关系

4 下载配置文件CentOS6-Base-163.repo
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
5 修改CentOS6-Base-163.repo ，将其中的$releasever 更改为centos的版本
vi CentOS6-Base-163.repo
：%s/$releasever/6

6 把配置文件放到指定目录 并且删除原来的配置文件
cd /etc/yum.repos.d
rm -fr *
mv /home/CentOS6-Base-163.repo ./

7 清除缓存 yum clean all

8 配置获取yum列表
yum makecache