红帽系统更换CentOS源

1. 首先到 http://mirrors.163.com/centos 下载软件包

i386地址：http://mirrors.163.com/centos/6/os/i386/Packages/
x86_64地址：http://mirrors.163.com/centos/6/os/x86_64/Packages/
必需要下载的软件包有（以64位系统为例）：

python-iniparse-0.3.1-2.1.el6.noarch.rpmyum-3.2.29-69.el6.centos.noarch.rpmyum-metadata-parser-1.1.2-16.el6.x86_64.rpmyum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

下载命令（以下仅前两个有效)：

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-69.el6.centos.noarch.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

经测试，以上命令仅仅前两个有效，后两个软件包需在http://mirrors.163.com/centos/6/os/x86_64/Packages手工下载下来，再安装。

2. 卸载RedHat自带的yum

rpm -qa | grepyum | xargs rpm -e --nodeps

3. 安装下载的centos的rpm包：

rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpmrpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpmrpm -ivhyum-3.2.29-69.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

4. 下载CentOS6-Base-163.repo文件

到http://mirrors.163.com的centos帮助文档中下载CentOS6-Base-163.repo文件，存放到/etc/yum.repos.d中:

wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

5. 编辑CentOS6-Base-163.repo文件

将 CentOS6-Base-163.repo 文件其中的 $releasever 更改为centos的版本号。
以下是修改好的(文件夹中有修改好的CentOS6-Base-163.repo，可直接替换后使用)：

#CentOS-Base.repo# Themirror system uses the connecting IP address of the client and the# updatestatus of each mirror to pick mirrors that are updated to and#geographically close to the client.  You should use this for CentOSupdates#unless you are manually picking other mirrors.# Ifthe mirrorlist= does not work for you, as a fall back you can try the#remarked out baseurl= line instead.[base]name=CentOS-6- Base - 163.combaseurl=http://mirrors.163.com/centos/6/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#releasedupdates[updates]name=CentOS-6- Updates - 163.combaseurl=http://mirrors.163.com/centos/6/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additionalpackages that may be useful[extras]name=CentOS-6- Extras - 163.combaseurl=http://mirrors.163.com/centos/6/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additionalpackages that extend functionality of existing packages[centosplus]name=CentOS-6- Plus - 163.combaseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#contrib- packages by Centos Users[contrib]name=CentOS-6- Contrib - 163.combaseurl=http://mirrors.163.com/centos/6/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

6. 清除原有缓存

yum clean all

如果提示yum源被另一个进程锁住了错误，使用一下命令解锁：

rm -rf /var/run/yum.pid

7. 获取yum列表

yum makecache

出现下面提示，表示yum更改完成：
Metadata CacheCreated