red hat6.5更新yum源

问题：

  redhat默认自带的yum源需要注册，才能更新，报错：

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

解决：

  不想付费，替换red hat的yum源
查看RHEL是否安装了yum，若是安装了，那么又有哪些yum包：

[root@localhost ~]# rpm -qa |grep yum

删除原有yum

[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps（不检查依赖，直接删除rpm包）

下载安装yum包

下载地址:http://centos.ustc.edu.cn/centos/6.5/os/x86_64/Packages/http://mirrors.163.com/centos/6/os/x86_64/Packages/找到对应包如：http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-73.el6.centos.noarch.rpmyum-metadata-parser-1.1.2-16.el6.x86_64.rpmyum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm

安装yum:

rpm -ivh yum-*

出现错误：

error: Failed dependencies:Python-urlgrabber >= 3.9.1-10 is needed by yum-3.2.29-73.el6.centos.noarch

原因：
  发现错误，python-urlgrabber版本必须大于等于3.9.1-10
查看系统的python-url信息

发现python-urlgrabber-3.9.1-9.el6.noarch 版本低于3.9.1-10 卸载：python-urlgrabber-3.9.1-9.el6.noarchrpm -e python-urlgrabber-3.9.1-9.el6.noarch下载： wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm安装：rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm

更换yum源，将原有源删除或备份到别的目下下：

 cd /etc/yum.repos.d/ wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo vi CentOS6-Base-163.repo    

   注意：编辑文件，把文件里面的$releasever全部替换为版本号：6（注意，不是6.5！）最后保存！

把$releasever替换成现有系统的版本号(6)vim替换命令：%s/$releasever/6/g退出保存

清除原有缓存，重建缓存：

 clean all yum makecache 

更新系统：

yum update

安装所需的包：

163源地址：http://mirrors.163.com/centos/6/os/x86_64/Packages/包：python-iniparse-0.3.1-2.1.el6.noarch.rpmpython-urlgrabber-3.9.1-11.el6.noarch.rpmyum-3.2.29-73.el6.centos.noarch.rpmyum-metadata-parser-1.1.2-16.el6.x86_64.rpmyum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm86_64.rpm[root@rhel2 software]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-73.el6.centos.noarch.rpm      wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpmwget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm