今天在VM7.X中安装了CentOS5.6，安装完成后想修改国内网易163高速源，以下是网络上找到的修改方法，不过任有报错，报错信息在最后，以下是源文件的修改：

cd /etc/yum.repos.d/
cp CentOS-Base.repo CentOS-Base.repo.bak
vi CentOS-Base.repo

粘贴如下内容

# CentOS-Base.repo

#

# 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-5.6 – Base – 163.com

baseurl=http://mirrors.163.com/centos/5.6/os/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=os

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

#released updates

[updates]

name=CentOS-5.6 – Updates – 163.com

baseurl=http://mirrors.163.com/centos/5.6/updates/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=updates

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5.6 – Addons – 163.com

baseurl=http://mirrors.163.com/centos/5.6/addons/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=addons

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-5.6 – Extras – 163.com

baseurl=http://mirrors.163.com/centos/5.6/extras/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=extras

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-5.6 – Plus – 163.com

baseurl=http://mirrors.163.com/centos/5.6/centosplus/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

#contrib – packages by Centos Users

[contrib]

name=CentOS-5.6 – Contrib – 163.com

baseurl=http://mirrors.163.com/centos/5.6/contrib/i386/

#mirrorlist=http://mirrorlist.centos.org/?release=5.6&arch=i386&repo=contrib

gpgcheck=1

enabled=0

gpgkey=http://mirrors.163.com/centos/5.6/os/i386/RPM-GPG-KEY-CentOS-5

以下是报错信息

http://mirrors.163.com/centos/5.6/os/i386/repodata/filelists.xml.gz: [Errno 12] Timeout: <urlopen error timed out>
Trying other mirror.
Error: failure: repodata/filelists.xml.gz from base: [Errno 256] No more mirrors to try.
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest
The program package-cleanup is found in the yum-utils package.

初步估计是镜像未找到，内网有很多限制，等待晚上空了再升级一次~