Still, when all is said and done, as Sergio Leunissen, a senior director for Oracle's Linux Business Solutions, noted in a UK Unix group newsletter, Oracle hasn't "talked about how our Linux is better than anyone else's Linux. Oracle has not forked and has no desire to fork Red Hat Enterprise Linux and maintain its own version. We don't differentiate on the distribution because we use source code provided by Red Hat to produce Oracle Enterprise Linux and errata. We don't care whether you run Red Hat Enterprise Linux or Enterprise Linux from Oracle and we'll support you in either case because the two are fully binary- and source-compatible. Instead, we focus on the nature and the quality of our support and the way we test Linux using real-world test cases and workloads."

So, while Oracle may add features, such as Yast, that sit above the core operating system or improve PHP functionality, at its heart, Unbreakable Linux remains RHEL's identical twin. On the surface, however, the two can no longer be mistaken for each other.