RHEL下yum更新出现This system is not registered with RHN解决办法

RHEL下yum更新出现This system is not registered with RHN解决办法 说一下如何改用CentOS的yum软件来升级未注册的RHEL系统: 首先 rpm -qa|grep yum 查看 yum 服务相关的包 # rpm -qa|grep yum www.2cto.com yum-security-1.1.16-13.el5_4.1 yum-3.

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