Chapter 4 Installation and Availability

You can download a full Oracle Linux 7 Update 3 installation media image from the Oracle Software Delivery Cloud at You can also obtain the latest Oracle Linux 7 packages from the Unbreakable Linux Network (ULN) and the Oracle Linux yum server.

You can install additional software for Oracle Linux 7 by subscribing to the different channels on ULN or by enabling the required repositories within the Oracle Linux yum server configuration. To explore the channels that are available to you on ULN, login to and view the Channels option. To view the Oracle Linux yum server repositories available for Oracle Linux 7, visit


Oracle Linux yum server does not provide equivalent repositories for some channels that are available on ULN. These channels provide non-open source packages.

If you are installing the update on a system on which you have previously installed the Oracle-supported OFED packages, see the following sections for instructions on how to update these packages during the upgrade:

UEK R4 Update 2 is the default boot kernel for fresh installations of Oracle Linux 7 but the UEK R3 kernel remains available if you need to continue to use this. For more information, see Unbreakable Enterprise Kernel: Release Notes for Unbreakable Enterprise Kernel Release 4 Update 2.

For systems that are running UEK R3 or UEK R4 and are subscribed to the ol7_x86_64_UEKR3 or ol7_x86_64_UEKR4 channel on ULN, or the ol7_x86_64_UEKR3 or ol7_x86_64_UEKR4 repository on Oracle Yum Server, upgrade to the latest UEK release as follows:

  1. Upgrade all packages on the system, including kernel packages.

    # yum update

    By default, the boot manager automatically enables the most recent kernel version so you do not need to change your GRUB configuration.

  2. Reboot the system.

    # systemctl reboot

Oracle Linux 7 Update 3 updates many major subsystems. To ensure that your updated systems function correctly, reboot them after updating.