Chapter 5 Creating and Using a Local ULN Mirror

You can configure a local yum server to mirror the ULN channels within your network. This approach reduces the overhead that is associated with registering and managing systems within ULN, while still provisioning systems with all of the available software and updates that are available on ULN. Systems that are not able to connect to the Internet, either directly or by using a proxy, can also use this approach to keep up to date with the latest software.

This approach requires that the yum server is registered with ULN, has the available disk space to host the mirrored channels and is subscribed to the channels that it hosts. Systems that use the local ULN mirror are dependent on the synchronization of packages on the local yum server with the most recent updates provided by Oracle through ULN. If the local ULN mirror falls out of date, systems within your network may not be able to install critical security updates.

This chapter provides information on the requirements to host a local ULN mirror and the procedure to set up and configure the yum server for this purpose. Instructions are provided for configuring client systems to access and use the local yum server to obtain updates.


If you are considering mirroring ULN channels on a local yum server, you should also investigate Spacewalk for Oracle Linux. Spacewalk provides tools to help with system maintenance, installation and package management, including tools to easily mirror ULN channels either from an intuitive web interface, or from a command line tool. For more information, see the Spacewalk for Oracle Linux documentation at