1.1 Supported Kernels

Oracle Linux 6 Update 5 ships with three sets of kernel packages:

By default, both the Unbreakable Enterprise Kernel and the Red Hat Compatible Kernel for the specific architecture (i386 or x86-64) are installed and the system boots the Unbreakable Enterprise Kernel.

The ISO image for Oracle Linux 6 Update 5 for i386 includes the Red Hat Compatible Kernel and the Unbreakable Enterprise Kernel Release 2 but not the Unbreakable Enterprise Kernel Release 3, which does not support i386.

The ISO image for Oracle Linux 6 Update 5 for x86-64 includes the Red Hat Compatible Kernel and the Unbreakable Enterprise Kernel Release 3 but not the Unbreakable Enterprise Kernel Release 2.

To make your system boot the Red Hat Compatible Kernel by default:

  1. Edit /etc/grub.conf and change the value of the default parameter to indicate the Red Hat Compatible Kernel. (Each entry for a bootable kernel in the file starts with a title definition. The entries are effectively numbered from 0 upwards, where 0 corresponds to the first entry in the file, 1 to the second entry, and so on. To view the GRUB manual, use the info grub command.)

  2. Edit /etc/sysconfig/kernel and change the setting for the default kernel package type from DEFAULTKERNEL=kernel-uek to DEFAULTKERNEL=kernel.