网易开通了一个开源软件的镜像站点，网址为：
             信息来源  [url]http://blog.s135.com/post/399/[/url]

　　[url]http://mirrors.163.com/[/url]

　　提供的镜像有：

　　1、Linux及BSD发行版镜像：FreeBSD、OpenBSD、RedHat、archlinux、centos、debian、fedora、gentoo、trixbox、ubuntu等。

　　2、开源软件镜像：eclipse可扩展开发平台、防火墙、openfiler网络存储管理工具。

　　该镜像目前只有一台杭州电信的服务器，网通用户访问可能会比较慢。


　　如果您安装 CentOS 5.2 系统的服务器位于电信机房，您可以修改/etc/yum.repos.d/CentOS-Base.repo文件，将它的yum源更改成网易的镜像，代替国外的镜像，以便获取更快的下载速度。

　　您可以按照以下步骤从 blog.s135.com 下载修改后的 CentOS-Base.repo 文件到您的服务器。

cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.bak
wget [url]http://blog.s135.com/soft/linux/centos/5.2/CentOS-Base.repo[/url]
CentOS-Base.repo 文件内容如下
 
# CentOS-Base.repo
#
# This file uses a new mirrorlist system developed by Lance Davis for CentOS.
# 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-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#released updates    
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/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-$releasever - Addons
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
#baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/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-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5