3.1 Upgrading to the Latest UEK Release

For systems that are currently running UEK R3, you upgrade to the latest UEK release as follows:

Ensure the system is configured to receive updates from the correct channels or repositories.
For Oracle Linux 6, subscribe to either the ol6_x86_64_UEKR3_latest channel on ULN, or the ol6_UEKR3_latest repository on the Oracle Yum Server.
For Oracle Linux 7, subscribe to either the ol7_x86_64_UEKR3 channel on ULN, or the ol7_UEKR3 repository on the Oracle public yum server.
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 or GRUB 2 configuration.
Reboot the system.
Oracle Linux 6:
```
# shutdown -r now
```
Oracle Linux 7:
```
# systemctl reboot
```