RedHat使用yum命令时提示not registered错误的解决方法

q2009a06z22

　　在redhat系统，使用yum命令时，提示：
　　This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
　　无法更新。
　　原因：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。
　　1.检查是否安装yum包
　　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

　　yum-metadata-parser-1.0-8.fc6
　　yum-3.0.1-5.el5
　　yum-rhn-plugin-0.4.3-1.el5
　　yum-updatesd-3.0.1-5.el5
　　2 删除redhat自带的yum包
　　卸载上面显示的所有yum包：

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

　　再用

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

[root@localhost ~]#

　　查看，无信息显示表示已经卸载完成。
　　看一下系统版本号和系统位数

[root@localhost ~]# cat /etc/issue && uname -a

　　3.下载新的yum包。使用Centos6.5的yum包
# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.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　　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
　　
　　4.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$releasever全部替换为版本号，即 6 最后保存！或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可（需根据实际情况修改好）
# CentOS-Base.repo## The mirror system uses the connecting IP address of the client and the# update status of each mirror to pick mirrors that are updated to and# geographically close to the client.  You should use this for CentOS updates# unless you are manually picking other mirrors.## If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead.## [base]name=CentOS-6.5 - Base - 163.combaseurl=http://mirrors.163.com/centos/6/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #released updates [updates]name=CentOS-6.5 - Updates - 163.combaseurl=http://mirrors.163.com/centos/6/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful[extras]name=CentOS-6.5 - Extras - 163.combaseurl=http://mirrors.163.com/centos/6.5/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that extend functionality of existing packages[centosplus]name=CentOS-6.5 - Plus - 163.combaseurl=http://mirrors.163.com/centos/6.5/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #contrib - packages by Centos Users[contrib]name=CentOS-6.5 - Contrib - 163.combaseurl=http://mirrors.163.com/centos/6.5/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6　　5.清除原有缓存
　　# yum clean all
　　重建缓存，以提高搜索安装软件的速度
　　 yum makecache
　　
　　若yum makecache时提示错误：
　　file:///nfs/cdrom/RHEL6.4/repodata/repomd.xml: [Errno 14] Could not open/read file:///nfs/cdrom/RHEL6.4/repodata/repomd.xml
　　解决：
　　    改名，把原来的rhel-source.repo备份为rhel-source.repo.bak
　　    把刚下载的CentOS6-Base-163.repo改名为rhel-source.repo即可。
　　
　　或把原来的rhel-source.repo下面的enable=1改成enable＝0即可