3.2.1 About the Unbreakable Linux Network

You have the option of registering a system with ULN when you install Oracle Linux 6 on a system. To register with ULN after installation, use the uln_register command.

To obtain Oracle Linux updates from ULN, you must have an Oracle Linux support subscription. For more information about ULN, see https://linux.oracle.com.

From Oracle Linux 6 Update 9, ULN registration subscribes a server to the Oracle Linux 6 latest channel and either the UEK R2 latest channel (ol6_i386_UEK_latest) for i386 or the UEK R4 channel (ol6_x86_64_UEKR4) for x86-64.

If you want to install UEK R4 on a ULN-registered x86-64 system that is currently running UEK R2, manually subscribe the system to the UEK R4 channel (ol6_x86_64_UEKR4) and unsubscribe the server from the UEK R2 latest channel (ol6_x86_64_UEK_latest) before running yum update.

ULN also provides channels for Oracle-specific software packages such as Oracle's ASMlib user-space package and the Oracle Instant Client. To enable access to these packages, log in to ULN and subscribe your system to the Oracle Software channel.