EulerOS

EulerOS is a commercial Linux distribution developed by Huawei based on Red Hat Enterprise Linux^[2] to provide an operating system for server and cloud environments.^[3][4] Its open-source community version is known as openEuler; the source code of openEuler was released by Huawei at Gitee in 2020.^[5] openEuler became an open-source project operated by OpenAtom Foundation after Huawei donated the source code of openEuler to the foundation on November 9, 2021.^[6][7][8]

openEuler

Developer	Huawei Technologies, OpenAtom Foundation (openEuler)
OS family	Linux (Unix-like), Unix (Compliant),[citation needed] HarmonyOS, OpenHarmony (openEuler (multi-kernel))
Working state	Active
Source model	Open-source
Initial release	December 31, 2019; 5 years ago (2019-12-31) (EulerOS)
Latest release	24.03 LTS (June 6, 2024)[1]
Latest preview	September 25, 2021; 3 years ago (2021-09-25) (openEuler)
Repository	gitee.com/openeuler
Marketing target	Servers, Cloud computing, Personal computers,[citation needed] Embedded devices,[citation needed] Edge computing
Platforms	AArch64 (Kunpeng), x86-64, 32-bit ARM, IA-32, RISC-V, and LoongArch
Kernel type	Monolithic (Linux), multi-kernel (openEuler) with UniProton Microkernel RTOS
Userland	GNU with UKUI, GNOME, Deepin, Kiran-desktop, and Xfce, POSIX, OpenHarmony, HarmonyOS (shared apps)
Influenced by	CentOS, HarmonyOS, OpenHarmony, LiteOS
License	Apache license
Official website	EulerOS

A new programming language for EulerOS and HarmonyOS was announced in September 2021.^[9]

On March 27, 2020, openEuler 20.03 LTS version was released in the open source repo as the first Long Term Support (LTS) edition.

openEuler 21.09 version launched with new file system called EulerFS, also a kernel upgrade that is organized similar to classic HarmonyOS and OpenHarmony multi-kernel architecture that carries both RTOS kernel and Linux kernel on October 1, 2021. Also, the operating system supports, UniProton RTOS kernel and kubeOS containerised OS.^[10]

EulerOS includes Apache HTTP Server which is known as Apache, as part of its supported tools on the platform.^[11]

KunLun Mission Critical Server

EulerOS 2.0, running on the Huawei KunLun Mission Critical Server, was certified in 2019 as conforming to the Single UNIX Specification (UNIX 03);^[12] however. the certification expired in September 2022.^[13]

EulerOS/KunLun allows replacing central processing unit board modules and memory modules without stopping the OS. Hot swapping of CPU and memory is provided by EulerOS.^[14]

Code shared with HarmonyOS and OpenHarmony

EulerOS with openEuler shares technology with Huawei's mobile operating system, HarmonyOS including BiSheng Compiler, distributed DSoftBus technology, OpenHarmony distributed file system (HMDFS), EROFS read-only file system and native HAP file format. Huawei plans to unify additional components between both OSes.^[15][16]

NestOS

In November 2021, NestOS, an operating system based on open source EulerOS was launched. It incorporates the features of EulerOS, enhancing its capabilities in the cloud to cater to specific needs. NestOS, while maintaining the EulerOS ecology, brings its own features for various applications.^[17]

In October 2022, the openEuler community updated the NestOS operating system to the new version based on the openEuler 22.09 version that include enhanced features to the system with nestos-assembler container image, optimized Kubernetes, and improvements to its OpenStack system.^[18]