Upgrading Your System

To upgrade your system to UEK R4:

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:
```
# yum update
```
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 are upgrading from Oracle Linux 7 Update 3 or Oracle Linux 7 Update 4 to Oracle Linux 7 Update 5 and you already have Oracle-supported OFED packages for UEK R4 installed on your system, follow the upgrade procedures that are described in the Oracle^® Linux 7: Release Notes for Oracle Linux 7 Update 5.

See https://docs.oracle.com/en/operating-systems/oracle-linux/6/admin/ol_yum.html in Oracle^® Linux 6: Administrator's Guide or https://docs.oracle.com/en/operating-systems/oracle-linux/7/admin/ol7_yum.html in Oracle^® Linux 7: Administrator's Guide for more information.

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.