Linux：redhat6.5使用yum时提示需要注册问题解决方案

一、问题

新安装了redhat6.5.安装后，登录系统，使用yum时候。提示：

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

无法使用。

redhat 默认自带的 yum 源需要注册，才能更新。我们想不花钱也可以更新，需要替换掉redhat的yum源。

二、检查是否安装yum包

rpm -qa |grep yum

三、删除redhat自带的yum包

卸载上面显示的所有yum包(不检查依赖，直接删除rpm包)：

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

再用命令查看是否已卸载

rpm -qa |grep yum

查看无信息显示表示已经卸载完成；

四、下载新的yum包(使用Centos6.5的yum包)

wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm

wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-3.2.29-40.el6.centos.noarch.rpm

wget http://mirrors.163.com/centos/6/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

五、安装yum软件包

注意:单个的安装包可能会依赖其它包(例如yum和yum-fastestmirror会相互依赖)，所以我们可以把所有这些包放在一起，用一行命令将它们同时安装即可：

rpm -ivh yum-metadata-parser-1.1.2-16.el6.i686.rpm yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

六、更换yum源(使用163的源)

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

vi CentOS6-Base-163.repo

编辑文件，把文件里面的$releasever全部替换为版本号，即更改为6，最后保存！或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可(已经修改好)

#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 - 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=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates

[updates]

name=CentOS-6 - Updates - 163.com

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

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

gpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#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=6.5&arch=$basearch&repo=extras

gpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#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=6.5&arch=$basearch&repo=centosplus

gpgcheck=1enabled=0

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

#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=6.5&arch=$basearch&repo=contrib

gpgcheck=1enabled=0

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

七、清除原有缓存

#重建缓存，以提高搜索安装软件的速度

yum clean all

八、更新系统

yum update