Red Hat offers a variety of open source software that DevOps engineers and businesses use. These include operating system platforms, storage, middleware, management products, as well as training, support and consulting services.
Red hat is a Modified version of Linux kernels for Enterprise Servers, it's famous because two biggest branches of Vanilla Linux kernel is Debian and Rhel. UNIX - A multi tasking and multi user Operating System for variety of computer architectures.
Red Hat® Enterprise Linux® is the world's leading enterprise Linux platform. * It's an open source operating system (OS). It's the foundation from which you can scale existing apps—and roll out emerging technologies—across bare-metal, virtual, container, and all types of cloud environments.