1）首先，需要移除系统注册相关软件

∘ 查看相关软件：rpm -qa | grep subscription-manager

∘ 移除相关软件：yum remove subscription-manager

2）为了使用CentOS提供的yum源，需要删除系统自带的yum

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

3）从Centos上下载安装yum

∘ wget http://vault.centos.org/6.0/os/x86_64/Packages/Python-iniparse-0.3.1-2.1.el6.noarch.rpm

∘ wget http://vault.centos.org/6.0/os/x86_64/Packages/yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm

∘ wget http://vault.centos.org/6.0/os/x86_64/Packages/yum-3.2.27-14.el6.centos.noarch.rpm

∘ wget http://vault.centos.org/6.0/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm

∘ rpm -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 yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm

∘ 注意： yum-3.2.27-14.el6.centos.noarch.rpm和yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm相互依赖，需要同时安装

4） 使用Centos的yum源更新

∘ cd /etc/yum.repos.d/

∘ wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo

∘ 编辑CentOS6-Base-163.repo，将$releasever字段全部替换为6

∘ yum makecache

∘ yum vim*   ===> 仅用作测试，观察yum是否可用

5）示例：安装VirtualBox-4.3

∘ 从virtualbox官网下载VirtualBox-4.3-4.3.30_101610_el6-1.x86_64.rpm和Oracle_VM_VirtualBox_Extension_Pack-4.3.30-101610.vbox-extpack

∘ rpm -ivh VirtualBox-4.3-4.3.30_101610_el6-1.x86_64.rpm，发现依赖libSDL

∘ yum install SDL

∘ rpm -ivh VirtualBox-4.3-4.3.30_101610_el6-1.x86_64.rpm，安装成功

∘ 双击运行Oracle_VM_VirtualBox_Extension_Pack-4.3.30-101610.vbox-extpack，安装扩展包

∘ 打开VirtualBox，开始自己的工作

以上就是小编为大家带来的在RHEL 6.5上使用yum更新/安装软件的操作方法全部内容了，希望大家多多支持~