yum not configures no repolist code example
Example: yum repository
# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
# dnf install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
# dnf install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm