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 cat Base.repo 
[Base]
name=BaseOS
baseurl=https://yum.oracle.com/repo/OracleLinux/OL9/4/baseos/base/x86_64/
enable=1
gpgcheck=0dnf install oraclelinux-release-el9yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm

yum repolist
repo id                                         repo name
Base                                            BaseOS
epel                                            Extra Packages for Enterprise Linux 9 - x86_64
epel-cisco-openh264                             Extra Packages for Enterprise Linux 9 openh264 (From Cisco) - x86_64
ol9_UEKR7                                       Oracle Linux 9 UEK Release 7 (x86_64)
ol9_appstream                                   Oracle Linux 9 Application Stream Packages (x86_64)
ol9_baseos_latest                               Oracle Linux 9 BaseOS Latest (x86_64)
 

yum repolist
repo id                                         repo name
Base                                            BaseOS
epel                                            Extra Packages for Enterprise Linux 9 - x86_64
epel-cisco-openh264                             Extra Packages for Enterprise Linux 9 openh264 (From Cisco) - x86_64
ol9_UEKR7                                       Oracle Linux 9 UEK Release 7 (x86_64)
ol9_appstream                                   Oracle Linux 9 Application Stream Packages (x86_64)
ol9_baseos_latest                               Oracle Linux 9 BaseOS Latest (x86_64)