RHEL8接入软件源
参考：
https://blog.csdn.net/m0_51517236/article/details/123060376
https://blog.csdn.net/mitays/article/details/119931657
禁用subsription-manager，否则会报错This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
编辑文件vim /etc/yum/pluginconf.d/subscription-manager.conf
将里面的enable改成0
[main]
enabled=0
下载CentOS 8的软件源repo文件，放入/etc/yum.repos.d/目录中
repo文件下载地址
https://mirrors.aliyun.com/repo/Centos-8.repo
然后执行yum install 就可以安装想要的软件了