RHEL的YUM源需要注册用户才能更新使用，由于CentOS和RHEL基本没有区别，并且CentOS已经被REHL收购。所以将RHEL的YUM源替换为CentOS即可。
新安装的redhat使用yum时会出现如下如下：
1 2 3 [root@localhost~]# yum repolist Loaded plugins: product-id, refresh-packagekit, security, subscription-manager This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
解决方法： 执行此脚本即可：(只对于Redhat6测试，具体方法后面)
1 curl -s https://www.hyman.shop/sh/redhat6-yum.sh |bash
清除原有RHEL的YUM及相关软件包。 1 2 [root@localhost~]# rpm -qa | grep yum | xargs rpm -e --nodeps [root@localhost~]# rpm -qa |grep python-urlgrabber|xargs rpm -e --nodeps
下载centos6的相关软件包。 1 2 3 4 5 [root@localhost~]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm [root@localhost~]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm [root@localhost~]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm [root@localhost~]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm [root@localhost~]# wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm
安装软件包。 1 2 3 4 5 [root@localhost~]# rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm [root@localhost~]# rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm [root@localhost~]# rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm [root@localhost~]# rpm -ivh yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm yum-3.2.29-81.el6.centos.noarch.rpm *注释yum-plugin-fastestmirror和yum-3.2.29要一起安装。
编辑文件 1 2 3 4 5 6 7 wget http://mirrors.163.com/.help/CentOS6-Base-163.repo [root@localhost~]# vim /etc/yum.repos.d/CentOS-Base.repo 把$releasever替换成现有系统的版cd本号(6) vim替换命令 ：%s/$releasever/6/g 退出保存
清理yum缓存 1 [root@localhost~]# yum clean all
将服务器软件包信息缓存至本地，提高搜索安装效率 1 [root@localhost~]# yum makecache