使用rpm来安装yum

        在使用redhat的时候，需要使用yum来安装软件包，但有的时候redhat没有安装yum，就需要使用rpm来将yum安装好，这样安装软件包就比较方便了。

本文包括配置本地源及第三方源。第三方源包括：网易，epel,repoforge ,rpmfusion 以下为详细过程：

1.删除redhat原有的yum 

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

2.下载yum安装文件 

注意，如果下载时找不到文件，就登录到：http://mirrors.163.com/centos/6/os/x86_64/ 上查找相应的文件。然后再下载。

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.27-14.el6.centos.noarch.rpm 

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm 

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm 

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

3.进行安装yum 

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

rpm -ivh yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm 

rpm -ivh yum-3.2.27-14.el6.centos.noarch.rpm um-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm  

注意最后两个包必需同时安装，否则会相互依赖 

4.更新repo文件

mv /etc/yum.repos.d/rhel-debuginfo.repo /etc/yum.repos.d/rhel-debuginfo.repo.repo.bak

vi /etc/yum.repos.d/rhel-debuginfo.repo

内容为：

[base]

name=CentOS-$releasever - Base

baseurl=http://mirrors.163.com/centos/6/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/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/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/centosplus/$basearch/

gpgcheck=1

enabled=0

5、yum clean all 

6. 测试运行

yum install php