The complementary relationship is also true. RHEL became the enterprise Linux distribution because it was the one used and supported by Oracle, back then, when

The complementary relationship is also true. RHEL became the enterprise Linux distribution because it was the one used and supported by Oracle, back then, when many companies still used Oracle as their database. I am talking about 15 years ago. Even nowadays at work, we all use Ubuntu in our workstations, but the servers run CentOS (another repackaging of RH). Without the support of Oracle, we all would be using SUSE in our servers, instead of a Red Hat based distro.