yum在线更新出现This system is not registered with RHN等错误解决方法
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5 安装Centos yum组件:[root@Linux yum.repos.d]# rpm -ivh --nodepshttps://mirrors.163.com/centos/5/os/x86_64/CentOS//yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm 5 安装Centos yum组件:[root@Linux yum.repos.d]# rpm -iv