Red Hat Enterprise Linux

Red Hat Enterprise Linux (RHEL) is a commercial Linux distribution developed by Red Hat. Red Hat Enterprise Linux is released in server versions for x86-64, Power ISA, ARM64, and IBM Z and a desktop version for x86-64. Fedora Linux and CentOS Stream serve as its upstream sources. All of Red Hat's official support and training, together with the Red Hat Certification Program, focuses on the Red Hat Enterprise Linux platform. The first version of Red Hat Enterprise Linux to bear the name originally came onto the market as "Red Hat Linux Advanced Server". In 2003, Red Hat rebranded Red Hat Linux Advanced Server to "Red Hat Enterprise Linux AS" and added two more variants, Red Hat Enterprise Linux ES and Red Hat Enterprise Linux WS. As Red Hat Enterprise Linux is heavily based on open-source software and its source code is available to the public, it is used as the basis for several third-party derivatives, including the commercial Oracle Linux and the community-supported Rocky Linux and AlmaLinux. Prior to June 2023, Red Hat published a subset of Red Hat Enterprise Linux's source code to the public in the form of modified build artifacts. Today, the complete source code for the major-version branch is available in the form of the CentOS Stream repositories. Source code for other release branches remains available to customers in the form of unmodified build artifacts.