编程要趁早 BI推荐8个编程学习网站

思路：卸载redhat自带yum，然后下载centos的yum，安装后修改配置文件

1、首先到http://mirrors.163.com/centos下载软件包

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x86 地址：http://mirrors.163.com/centos/6/os/i386/Packages/

x86_64 地址：http://mirrors.163.com/centos/6/os/x86_64/Packages/

必要下载的软件包有（以64位系统为例）：

a<wbr>python-iniparse-0.3.1-2.1.el6.noarch.rpm</wbr>

b<wbr>yum-3.2.29-40.el6.centos.noarch.rpm</wbr>

c<wbr>yum-metadata-parser-1.1.2-16.el6.x86_64.rpm</wbr>

d<wbr>yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm</wbr>

下载命令：

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

[注] :版本不一定要最新的

2、卸载RedHat自带的yum

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<wbr><wbr><wbr><wbr><wbr>rpm -qa | grep yum | xargs rpm -e --nodeps</wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr>注：a、xargs是一条<a target="_blank" href="http://baike.baidu.com/view/8095.htm" style="text-decoration:none; color:rgb(49,139,146)">Unix</a>和类Unix操作系统的常用命令。它的作用是将参数列表转换成小块分段传递给其他命令，以避免参数列表过长的问题</wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>b、--nodeps<wbr>强制卸载,不管依赖性</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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3、安装下载的centos的yum包：

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rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm

rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

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[注] :最后2个需要一起安装，否则会出现依赖性错误

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4、到http://mirrors.163.com的centos帮助文档中下载CentOS6-Base-163.repo文件，存放到/etc/yum.repo.d中

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wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
5、编辑CentOS6-Base-163.repo文件，将其中的$releasever更改为centos的版本号

下面是修改好的：

# 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.<wbr>You should use this for CentOS updates</wbr> # 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. # # <wbr></wbr> [base] name=CentOS-6 - Base - 163.com baseurl=http://mirrors.163.com/centos/6/os/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 <wbr></wbr> #released updates [updates] name=CentOS-6 - Updates - 163.com baseurl=http://mirrors.163.com/centos/6/updates/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 <wbr></wbr> #additional packages that may be useful [extras] name=CentOS-6 - Extras - 163.com baseurl=http://mirrors.163.com/centos/6/extras/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 <wbr></wbr> #additional packages that extend functionality of existing packages [centosplus] name=CentOS-6 - Plus - 163.com baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 <wbr></wbr> #contrib - packages by Centos Users [contrib] name=CentOS-6 - Contrib - 163.com baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

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6、yum clean all清除原有缓存

7、yum makecache<wbr>获取yum列表</wbr>

出现下面提示，表示yum更改完成：

Metadata Cache Created