3.3 Switching an Oracle Linux 6 System to UEK R3 (Oracle Yum Server)

If your system is not registered with ULN, you can obtain most of the packages for Unbreakable Enterprise Kernel Release 3 (UEK R3) from Oracle Yum Server by subscribing it to additional repositories.

Before you begin:

Check that the system meets the requirements for installing UEK R3.
For details, see Chapter 3, Installation and Availability.
Remove some of the existing OpenFabrics Enterprise Distribution (OFED) packages.
You only need to do this if you have installed any OFED packages on your system and you want to replace them with the latest OFED tools packages. The packages have to be removed manually, see Section 3.4, “Upgrading OFED Packages on Oracle Linux 6 Systems”.

To Switch a System to UEK R3:

Log in as root on the system.
Change directory to /etc/yum.repos.d.
```
# cd /etc/yum.repos.d
```
Note
This assumes that yum on your system is configured to find repository files in the default /etc/yum.repos.d directory.
Download the Oracle Linux 6 repository configuration file, https://yum.oracle.com/public-yum-ol6.repo.
For example:
```
# wget https://yum.oracle.com/public-yum-ol6.repo
```
The /etc/yum.repos.d directory is updated with the repository configuration file.

Enable the required repositories by editing the public-yum-ol6.repo file.

You enable or disable repositories in the file by setting the value of the enabled directive to 1 or 0 as required.

The kernel image and user-space packages are available on the following Oracle Yum Server repositories:

Repository	Description
`ol6_latest`	All packages released for Oracle Linux 6 (x86_64) including the latest errata packages.
`ol6_UEKR3_latest`	Latest packages for Unbreakable Enterprise Kernel Release 3 for Oracle Linux 6. Contains the `kernel-uek`, `dtrace-modules-`, `libdtrace-*`, and `uname26` packages.
`ol6_ofed_UEK`	Latest OpenFabrics Enterprise Distribution (OFED) supporting tools for the Unbreakable Enterprise Kernel (UEK) on Oracle Linux 6 (x86_64).

Repository

Description

ol6_latest

All packages released for Oracle Linux 6 (x86_64) including the latest errata packages.

ol6_UEKR3_latest

Latest packages for Unbreakable Enterprise Kernel Release 3 for Oracle Linux 6.

Contains the kernel-uek*, dtrace-modules-*, libdtrace-*, and uname26 packages.

ol6_ofed_UEK

Latest OpenFabrics Enterprise Distribution (OFED) supporting tools for the Unbreakable Enterprise Kernel (UEK) on Oracle Linux 6 (x86_64).

As a minimum, you should enable the ol6_latest and the ol6_UEKR3_latest repositories.

Note

The DTrace and DRBD utility packages are not available on Oracle Yum Server.

Because you are switching to the latest UEK kernel, you can disable the previous UEK R2 (ol6_UEK_latest) repository.

In the following example, the ol6_UEKR3_latest repository is enabled, and the ol6_UEK_latest repository is disabled:

[ol6_UEKR3_latest]
name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)
baseurl=https://yum.oracle.com/repo/OracleLinux/OL6/UEKR3/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

[ol6_UEK_latest]
name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)
baseurl=https://yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

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.
Reboot the system.
```
# shutdown -r now
```