对在中国的CentOS支持者们，一件好事情：CentOS终于有了在中国的镜像，分别设在上海、香港、福建。
活用这个资源的之一，就是通过yum高速更新系统。
在初始环境设置中，我们可以将yum作为一项常驻的服务自动更新系统，但默认的服务器是官方的站点，离中国用户比较远，速度不堪忍受。但修改yum相应配置文件就可以达到高速更新系统的目的，方法如下：
修改/etc/yum.repos.d/CentOS-Base.repo，将镜象站点地址改为在中国的景象站点地址。如下4个为国内镜像：
http://mirror.vmmatrix.net/CentOS/$releasever/os/$basearch/
http://mirror.be10.com/centos/$releasever/os/$basearch/
http://centos.hostlink.com.hk/$releasever/os/$basearch/
http://ftp.hostrino.com/pub/centos/
具体修改内容如下
CODE:
C#代码
- # 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-$releasever - Base
- baseurl=http://mirror.vmmatrix.net/CentOS/$releasever/os/$basearch/
- http://mirror.be10.com/centos/$releasever/os/$basearch/
- http://centos.hostlink.com.hk/$releasever/os/$basearch/
- http://ftp.hostrino.com/pub/centos/
- gpgcheck=1
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
- #released updates
- [update]
- name=CentOS-$releasever - Updates
- baseurl=http://mirror.vmmatrix.net/CentOS/$releasever/os/$basearch/
- http://mirror.be10.com/centos/$releasever/os/$basearch/
- http://centos.hostlink.com.hk/$releasever/os/$basearch/
- http://ftp.hostrino.com/pub/centos/
- gpgcheck=1
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
- #packages used/produced in the build but not released
- [addons]
- name=CentOS-$releasever - Addons
- baseurl=http://mirror.vmmatrix.net/CentOS/$releasever/os/$basearch/
- http://mirror.be10.com/centos/$releasever/os/$basearch/
- http://centos.hostlink.com.hk/$releasever/os/$basearch/
- http://ftp.hostrino.com/pub/centos/
- gpgcheck=1
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
- #additional packages that may be useful
- [extras]
- name=CentOS-$releasever - Extras
- baseurl=http://mirror.vmmatrix.net/CentOS/$releasever/os/$basearch/
- http://mirror.be10.com/centos/$releasever/os/$basearch/
- http://centos.hostlink.com.hk/$releasever/os/$basearch/
- http://ftp.hostrino.com/pub/centos/
- gpgcheck=1
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
- #additional packages that extend functionality of existing packages
- [centosplus]
- name=CentOS-$releasever - Plus
- baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
- gpgcheck=1
- enabled=0
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
- #contrib - packages by Centos Users
- [contrib]
- name=CentOS-$releasever - Contrib
- baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
- gpgcheck=1
- enabled=0
- gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4
然后更新一次系统，并将yum设置为自启动，让其即时自动为系统更新。
# yum -y update
# chkconfig yum on
# /etc/rc.d/init.d/yum start
经常会碰到这个问题
http://mirror.be10.com/centos/5/os/i386/repodata/primary.xml.gz: [Errno -1] Metadata file does not match checksum
像这个问题可以用这个方法解决： yum clean metadata
然后重新启用就ok了
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转载自 <a href="http://www.yanghengfei.com/archives/81/" title="CentOS 升级中国国内镜像" rel="bookmark">CentOS 升级中国国内镜像 | 星外飞客 </a>
我简单说几句