Oracle Linux 5.6 makes Unbreakable Enterprise Kernel the default kernel after installation unless you perform a custom installation. Note that Unbreakable Enterprise Kernel is available for the x86_64 platform only. The Unbreakable Enterprise Kernel is delivered via the package kernel-uek .
Blog about usage of Oracle's Enterprise Linux (OEL) aka "Unbreakable Linux" in a data center. Installation, configuration, tweaks, hacks, tips and tricks... whatever and all of the above, as we deploy Linux servers as the choice for all non-Microsoft services