Oracle supports Red Hat Enterprise Linux (RHEL) installations by providing Oracle Linux Premier Support included as part of OCI subscriptions at no additional cost to OCI customers. To update RHEL instances, Oracle provides updates that are available as Oracle Linux binaries. Such binaries are fully compatible with RHEL and will work without any reinstallation or other coding changes.
Oracle provides updates for RHEL instances from the Oracle Linux yum server in Oracle Cloud Infrastructure and the Unbreakable Linux Network (ULN). All security and bug fix errata will be Oracle Linux binaries. Refer to the Getting Started – How to Connect to Oracle Linux Yum Server document on how to connect to the Oracle Linux yum server and obtain software updates via yum for Oracle Linux and compatible Linux distributions such as Red Hat Enterprise Linux (RHEL) and CentOS. It is recommended that you use the local yum server in Oracle Cloud Infrastructure rather than the Unbreakable Linux Network (ULN) when running Oracle Linux in Oracle Cloud Infrastructure, since access to the OCI regional yum server is faster and does not incur any network charges.
You can also use Oracle Ksplice for zero-downtime patching of your RHEL instances on Oracle Cloud Infrastructure. Oracle Ksplice is supported for RHEL, CentOS, and Ubuntu instances on Oracle Cloud Infrastructure (OCI) at no additional cost to OCI customers. More information can be found in the in the Installing Ksplice Uptrack within Oracle Cloud Infrastructure section of the Ksplice User’s Guide.
You can choose to switch from Red Hat Enterprise Linux to Oracle Linux to take advantage of all the features and benefits provided, by applying Oracle Linux updates. You can use the Oracle Linux Unbreakable Enterprise Kernel (UEK) or Red Hat Compatible Kernel (RHCK), which are both supported by Oracle. To change the default kernel (UEK) for Oracle Linux instances in Oracle Cloud Infrastructure, and boot into an older or other kernel such as RHCK, refer to the document: Oracle Linux – How to Change the Default Kernel.