YUM源加载报错 This system is not registered to Red Hat Subscription Management

加载yum源时加载失败, 报错 This system is not registered to Red Hat Subscription Management

报错信息

#yum  repolist
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Bad id for repo: rhel 73, byte =   4
repolist: 0

原因

yum仓库配置错误，注意yum仓库不允许出现空格

$ cat /etc/yum.repos.d/rhel.repo
[rhel79]
name=Red Hat Enterprise Linux rhel79
baseurl=http://www.weirui.vip/rhel76/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release