To upgrade your system to UEK R4:

1. After enabling access to the appropriate channels, including ol6_UEKR4 or ol7_UEKR4, on the Oracle Linux yum server or ol6_x86_64_UEKR4 or ol7_x86_64_UEKR4 on ULN, run the following command to upgrade the system to UEK R4:

   # yum update

2. After upgrading the system, reboot it, selecting the UEK R4 kernel (version 4.1.12) if this is not the default boot kernel.

   See https://docs.oracle.com/en/operating-systems/oracle-linux/7/admin/ol7-bootconf.html for more information on updating the default boot kernel on Oracle Linux 7.

   See https://docs.oracle.com/en/operating-systems/oracle-linux/6/admin/ol_bootconf.html for more information on updating the default boot kernel on Oracle Linux 6.

For instructions on how to install the Oracle-supported OFED packages after upgrading to UEK R4, see Installing the Oracle-Supported OFED Packages.

If you have questions regarding configuring or using yum to install updates, refer to Oracle^® Linux: Unbreakable Linux Network User's Guide for Oracle Linux 6 and Oracle Linux 7.

The kernel's source code is available via a public git source code repository at https://oss.oracle.com/git/?p=linux-uek.git;a=summary.