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We may encounter this situation when we use the Yum command in Redhat, and yum install build-essential prompts this system was not registered with the portal, then Yum installation fails. Share the solution below.
Redhat This error is due to the lack of registered portal, we just need to update the source of Yum. Use the command cd/etc/yum.repos.d/to enter the Yum configuration directory.
Enter the wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo command in the terminal to download the Centos-base.repo file.
Then back up the original Rhel-debuginfo.repo, using the command MV Centos-base.repo Rhel-debuginfo.repo, will centos- Base.repo renamed to Rhel-debuginfo.repo.
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Successfully installed with Yum install build-essential.
Configure the source to install what you want to install (no more source resources without Ubuntu)
Redhat Configuring the source of CentOS