yum安裝提示“This system is not registered with RHN

使用yum安裝軟體的時候提示“This system is not registered with RHN”，這是因為在裝作業系統的時候沒有輸入註冊碼。我搜集整理了一些網上的資料說一下如何改用CentOS的yum軟體來升級未註冊的RHEL系統：

首先 rpm -qa|grep yum 查看 yum 服務相關的包

# rpm -qa|grep yum

yum-security-1.1.16-13.el5_4.1

yum-3.2.22-33.el5

yum-updatesd-0.9-2.el5

yum-metadata-parser-1.1.2-3.el5

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

強制移除這一些包

下載CentOS yum 服務相關的 rpm 包

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-3.2.22-39.el5.centos.noarch.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm

# rpm -ivh yum-*

warning: yum-3.2.22-39.el5.centos.noarch.rpm: Header V3 DSA signature: NOKEY, key ID e8562897

Preparing… ########################################### [100%]

1:yum-metadata-parser ########################################### [ 33%]

2:yum-fastestmirror ########################################### [ 67%]

3:yum ########################################### [100%]

哦了，安裝完畢，現在進入系統的yum目錄

# cd /etc/yum.repos.d/

# mv rhel-debuginfo.repo rhel-debuginfo.repo.bakup

# mv rhel-source.repo rhel-source.repo.bakup

# wget linuxtone.org/soft/lemp/CentOS-Base.repo">http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo （下載CentOS的repo包）

# yum makecache

等待 yum 庫更新完畢，就可以 yum 安裝軟體了

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yum-metadata-parser-1.1.2-4.el5.x86_64.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-4.el5.x86_64.rpm

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yum-3.2.22-40.el5.centos.noarch.rpm

wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-3.2.40.el5.centos.noarch.rpm

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