根據redhat操作系統版本及位數，下載對應centos的版本及位數的這些包：
yum-3.2.22-40.el5.centos.noarch.rpm
yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
yum-metadata-parser-1.1.2-4.el5.x86_64.rpm
1.先安裝yum-metadata-parser-1.1.2-4.el5.x86_64.rpm：
rpm -ivh yum-metadata-parser-1.1.2-4.el5.x86_64.rpm
2.同時安裝yum-3.2.22-40.el5.centos.noarch.rpm、yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
rpm -ivh yum-3.2.22-40.el5.centos.noarch.rpm yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
3.獲取163yum:
wget http://mirrors.163.com/.help/CentOS-Base-163.repo
文件內容替換：
把CentOS-Base-163.repo文件中的 “$releasever”，替換成“5”(5爲系統的版本號。)
vi CentOS-Base-163.repo
:% s/\$releasever/5/g
[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/6.3/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/6.3/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever - Addons
#baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
#gpgcheck=1
#gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/6.3/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/6.3/centosplus/$basearch/
gpgcheck=1
enabled=0