之前没有使用过网易CentOS镜像的yum源，最近由于需要，遂在一台测试服务器验证、测试了一下如何配置使用网易的Cent0S的yum源。此文仅仅是笔记性质，参考了网上大量资料（文末“参考资料”的相关链接）。
1： 删除RHEL 6.6原有的YUM相关包
[root@mytestlnx03 ~]# rpm -qa | grep yum
yum-plugin-security-1.1.30-30.el6.noarch
kabi-yum-plugins-1.0-2.el6.noarch
PackageKit-yum-0.5.8-23.el6.x86_64
yum-plugin-downloadonly-1.1.30-30.el6.noarch
yum-rhn-plugin-0.9.1-50.el6.noarch
yum-plugin-changelog-1.1.30-30.el6.noarch
yum-plugin-versionlock-1.1.30-30.el6.noarch
yum-3.2.29-60.el6.noarch
yum-presto-0.6.2-1.el6.noarch
yum-plugin-aliases-1.1.30-30.el6.noarch
PackageKit-yum-plugin-0.5.8-23.el6.x86_64
yum-utils-1.1.30-30.el6.noarch
yum-plugin-verify-1.1.30-30.el6.noarch
yum-plugin-tmprepo-1.1.30-30.el6.noarch
yum-metadata-parser-1.1.2-16.el6.x86_64
[root@mytestlnx03 ~]# rpm -qa | grep yum | xargs rpm -e --nodeps
warning: /etc/yum.conf saved as /etc/yum.conf.rpmsave
[root@mytestlnx03 ~]# rpm -qa | grep yum
[root@mytestlnx03 ~]#
2：下载yum的相关安装包
注意：由于yum源一直在更新，所以有可能下面这些安装包已经不存在了（新的安装包给替换了），所以必须直接去网易的官方镜像验证确认，如果更新了，使用最新的安装包即可。http://mirrors.163.com/centos/6/os/x86_64/Packages/
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.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-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
网上有些资料还安装了其它yum相关包。这里测试发现这些包已经足够，当然测试也不充分，理解没有深入。仅仅是使用简单的功能
3：安装yum相关包以及依赖的包
[root@mytestlnx03 tmp]# rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
warning: python-iniparse-0.3.1-2.1.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
package python-iniparse-0.3.1-2.1.el6.noarch is already installed
安装python-urlgrabber与原来的python中的组件冲突，如下所示，之前卸载yum相关组件时，没有卸载python-urlgrabber-3.9.1-9.el6.noarch
[root@mytestlnx03 tmp]# rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm
warning: python-urlgrabber-3.9.1-11.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.py from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-9.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.pyc from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-9.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.pyo from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-9.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/progress.pyc from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-9.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/progress.pyo from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-9.el6.noarch
[root@mytestlnx03 tmp]# rpm -qa|grep python-url
python-urlgrabber-3.9.1-9.el6.noarch
[root@mytestlnx03 tmp]# rpm -e --nodeps python-urlgrabber-3.9.1-9.el6.noarch
[root@mytestlnx03 tmp]# rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm
warning: python-urlgrabber-3.9.1-11.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
1:python-urlgrabber ########################################### [100%]
[root@mytestlnx03 tmp]# rpm -ivh yum-3.2.29-81.el6.centos.noarch.rpm yum-metadata-parser-1.1.2-16.el6.x86_64.rpm yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm
warning: yum-3.2.29-81.el6.centos.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
1:yum-metadata-parser ########################################### [ 33%]
2:yum-plugin-fastestmirro########################################### [ 67%]
3:yum ########################################### [100%]
4：修改yum的repo配置文件
删除原yum的配置文件
[root@mytestlnx03 tmp]# cd /etc/yum.repos.d/
[root@mytestlnx03 yum.repos.d]# ls
backup redhat.repo rhel-source.repo server.repo
[root@mytestlnx03 yum.repos.d]# rm -rf *
下载repo文件，放在 /etc/yum.repos.d/下面
[root@mytestlnx03 yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
--2019-07-22 14:11:02-- http://mirrors.163.com/.help/CentOS6-Base-163.repo
Connecting to 192.168.27.92:3128... connected.
Proxy request sent, awaiting response... 200 OK
Length: 2006 (2.0K) [application/octet-stream]
Saving to: “CentOS6-Base-163.repo”
100%[=================================================================================================>] 2,006 --.-K/s in 0s
2019-07-22 14:11:02 (73.2 MB/s) - “CentOS6-Base-163.repo” saved [2006/2006]
[root@mytestlnx03 yum.repos.d]#
修改配置文件CentOS6-Base-163.repo：将baseurl中的$releasever修改为centos版本号，这里使用6替换，如下截图所示：
5：测试验证yum配置是否正确
[root@mytestlnx03 ~]# yum clean all
[root@mytestlnx03 ~]# yum list | grep ls
参考资料：
https://blog.csdn.net/dujianxiong/article/details/78481912
https://www.cnblogs.com/ssyfj/p/9172147.html
http://mirrors.163.com/centos/6/