centos5和6更换为163源
一： 更换为163源的方式如下，也可以说是一个非常简单的脚本：
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
cat <<EOF> /etc/yum.repos.d/CentOS-Base.repo
# 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-\$releasever - Base - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=os
baseurl=http://mirrors.163.com/centos/\$releasever/os/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#released updates
[updates]
name=CentOS-\$releasever - Updates - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=updates
baseurl=http://mirrors.163.com/centos/\$releasever/updates/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#packages used/produced in the build but not released
[addons]
name=CentOS-\$releasever - Addons - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=addons
baseurl=http://mirrors.163.com/centos/\$releasever/centosplus/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#additional packages that may be useful
[extras]
name=CentOS-\$releasever - Extras - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=extras
baseurl=http://mirrors.163.com/centos/\$releasever/extras/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-\$releasever - Plus - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=centosplus
baseurl=http://mirrors.163.com/centos/\$releasever/centosplus/\$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#contrib - packages by Centos Users
[contrib]
name=CentOS-\$releasever - Contrib - 163.com
mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=contrib
baseurl=http://mirrors.163.com/centos/\$releasever/contrib/\$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
EOF
二： 如果是centos6版本的话，再执行下列语句：
sed 's/RPM-GPG-KEY-CentOS-5/RPM-GPG-KEY-CentOS-6/g' /etc/yum.repos.d/CentOS-Base.repo -i
三： 更换源执行下列：
yum clean all
yum list |more #查看一下有没有快点