=====Oracle Repository=====
Here is a link for instructions on how to do it [[https://docs.oracle.com/en/operating-systems/oracle-linux/uln-user/uln-CreatingandUsingaLocalULNMirror.html#ol7-relocal-repo | create a local Yum Mirror for Oracle]]

It is different from Redhat.

You have to use the following command to import the RMP-GPG-Key otherwise pacakges will be listed but will not be installed
  
  # rpm --import /usr/share/rhn/RPM-GPG-KEY