问题：redhat 6.4 默认自带的 yum 源需要注册，才能更新。

解决方案：删除默认的yum源，手动配置Centos 6.5的yum源。

我这里的系统是RedHat 6.4的所以在 http://mirrors.163.com/centos/6/os/x86_64/Packages/  下载相关rpm包

1.首先查找系统自动安装了那些yum包

# rpm -qa | grep yum

2.删除默认安装的yum包，不检查依赖关系

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

3.再次查看是否删除成功

# rpm -qa | grep yum

4.下载新的yum包

# 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-3.2.29-69.el6.centos.noarch.rpm

# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.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

5.安装yum包

# 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-3.2.29-69.el6.centos.noarch.rpm  yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm

6.提供yum源的配置文件

# cd /etc/yum.repos.d/

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

# vim CentOS6-Base-163.repo# 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. You should use this for CentOS updates

# 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.

#

#

[base]

name=CentOS-6.5 - Base - 163.com

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

#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=os

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates

[updates]

name=CentOS-6.5 - Updates - 163.com

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

#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=updates

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful

[extras]

name=CentOS-6.5 - Extras - 163.com

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

#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=extras

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-6.5 - Plus - 163.com

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

#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users

[contrib]

name=CentOS-6.5 - Contrib - 163.com

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

#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=contrib

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

PS：编辑配置文件，把文件里面的$release全部替换为版本号，即6.5 最后保存。

7.清除原有缓存

# yum clean all

8.重建缓存，以提高搜索安装软件的速度

# yum makecache

9.最后更新下

# yum update