Oracle Linux 7 support is only provided on fresh install of EECS 2.0.6.4.0 on Exalogic physical X3-2, X4-2, X5-2, and X6-2 racks. Upgrade from an earlier version of Oracle Linux is not supported.
More operating system information about the supported version of Oracle Linux 7:
Oracle Linux Server release 7.4
UEK4 kernel 4.1.12-112.14.13.el7uek.x86_64.
Includes security updates on top of the Oracle Linux 7.4 release.
500MB boot partition.
Oracle recommends strongly that reimaging and configuring the compute nodes to Oracle Linux 7 be performed by fully trained, qualified Oracle personnel or by formally accredited Oracle partners. For more information, contact Oracle Advanced Customer Support (http://www.oracle.com/acs).