CentOS 6 官方源已停止維護，更換為国内高速鏡像（網易 163、東軟）是必修課。本文提供從卸載舊套件、下載核心 RPM、安裝、配置 .repo 到驗證的標準化流程。

步驟 1：強制卸載舊版 yum 套件

rpm -qa | grep yum | xargs rpm -e --nodeps

步驟 2：下載 4 個核心 RPM 套件

從鏡像站 /centos/6/os/x86_64/Packages/ 下載：

• python-iniparse-0.3.1-2.1.el6.noarch.rpm
• yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
• yum-3.2.29-60.el6.centos.noarch.rpm
• yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

wget https://mirrors.163.com/centos/6/os/x86_64/Packages/...

步驟 3：安裝（注意依賴順序）

rpm -ivh python-iniparse-*.rpm
rpm -ivh yum-metadata-parser-*.rpm
rpm -ivh yum-*.rpm yum-plugin-fastestmirror-*.rpm  # 最後兩個需同時安裝

步驟 4：配置 .repo 文件

建立 /etc/yum.repos.d/163.repo：

[base]
name=CentOS-6 - Base
baseurl=https://mirrors.163.com/centos/6/os/$basearch/
gpgcheck=1
gpgkey=https://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

[updates]
name=CentOS-6 - Updates
baseurl=https://mirrors.163.com/centos/6/updates/$basearch/
gpgcheck=1
gpgkey=https://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

[extras]
name=CentOS-6 - Extras
baseurl=https://mirrors.163.com/centos/6/extras/$basearch/
gpgcheck=1
gpgkey=https://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

[centosplus]
name=CentOS-6 - Plus
baseurl=https://mirrors.163.com/centos/6/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

[contrib]
name=CentOS-6 - Contrib
baseurl=https://mirrors.163.com/centos/6/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

或直接下載現成：wget https://mirrors.163.com/.help/CentOS6-Base-163.repo -O /etc/yum.repos.d/CentOS6-Base-163.repo

步驟 5：驗證與加速

yum clean all
yum makecache
yum list
yum install yum-fastestmirror -y  # 自動選最快鏡像

完成後 yum install 即可高速下載安裝任意套件。