Skip to main content
Redhat Developers  Logo
  • Products

    Featured

    • Red Hat Enterprise Linux
      Red Hat Enterprise Linux Icon
    • Red Hat OpenShift AI
      Red Hat OpenShift AI
    • Red Hat Enterprise Linux AI
      Linux icon inside of a brain
    • Image mode for Red Hat Enterprise Linux
      RHEL image mode
    • Red Hat OpenShift
      Openshift icon
    • Red Hat Ansible Automation Platform
      Ansible icon
    • Red Hat Developer Hub
      Developer Hub
    • View All Red Hat Products
    • Linux

      • Red Hat Enterprise Linux
      • Image mode for Red Hat Enterprise Linux
      • Red Hat Universal Base Images (UBI)
    • Java runtimes & frameworks

      • JBoss Enterprise Application Platform
      • Red Hat build of OpenJDK
    • Kubernetes

      • Red Hat OpenShift
      • Microsoft Azure Red Hat OpenShift
      • Red Hat OpenShift Virtualization
      • Red Hat OpenShift Lightspeed
    • Integration & App Connectivity

      • Red Hat Build of Apache Camel
      • Red Hat Service Interconnect
      • Red Hat Connectivity Link
    • AI/ML

      • Red Hat OpenShift AI
      • Red Hat Enterprise Linux AI
    • Automation

      • Red Hat Ansible Automation Platform
      • Red Hat Ansible Lightspeed
    • Developer tools

      • Red Hat Trusted Software Supply Chain
      • Podman Desktop
      • Red Hat OpenShift Dev Spaces
    • Developer Sandbox

      Developer Sandbox
      Try Red Hat products and technologies without setup or configuration fees for 30 days with this shared Openshift and Kubernetes cluster.
    • Try at no cost
  • Technologies

    Featured

    • AI/ML
      AI/ML Icon
    • Linux
      Linux Icon
    • Kubernetes
      Cloud icon
    • Automation
      Automation Icon showing arrows moving in a circle around a gear
    • View All Technologies
    • Programming Languages & Frameworks

      • Java
      • Python
      • JavaScript
    • System Design & Architecture

      • Red Hat architecture and design patterns
      • Microservices
      • Event-Driven Architecture
      • Databases
    • Developer Productivity

      • Developer productivity
      • Developer Tools
      • GitOps
    • Secure Development & Architectures

      • Security
      • Secure coding
    • Platform Engineering

      • DevOps
      • DevSecOps
      • Ansible automation for applications and services
    • Automated Data Processing

      • AI/ML
      • Data Science
      • Apache Kafka on Kubernetes
      • View All Technologies
    • Start exploring in the Developer Sandbox for free

      sandbox graphic
      Try Red Hat's products and technologies without setup or configuration.
    • Try at no cost
  • Learn

    Featured

    • Kubernetes & Cloud Native
      Openshift icon
    • Linux
      Rhel icon
    • Automation
      Ansible cloud icon
    • Java
      Java icon
    • AI/ML
      AI/ML Icon
    • View All Learning Resources

    E-Books

    • GitOps Cookbook
    • Podman in Action
    • Kubernetes Operators
    • The Path to GitOps
    • View All E-books

    Cheat Sheets

    • Linux Commands
    • Bash Commands
    • Git
    • systemd Commands
    • View All Cheat Sheets

    Documentation

    • API Catalog
    • Product Documentation
    • Legacy Documentation
    • Red Hat Learning

      Learning image
      Boost your technical skills to expert-level with the help of interactive lessons offered by various Red Hat Learning programs.
    • Explore Red Hat Learning
  • Developer Sandbox

    Developer Sandbox

    • Access Red Hat’s products and technologies without setup or configuration, and start developing quicker than ever before with our new, no-cost sandbox environments.
    • Explore Developer Sandbox

    Featured Developer Sandbox activities

    • Get started with your Developer Sandbox
    • OpenShift virtualization and application modernization using the Developer Sandbox
    • Explore all Developer Sandbox activities

    Ready to start developing apps?

    • Try at no cost
  • Blog
  • Events
  • Videos

What's new in Red Hat Enterprise Linux 9.1

November 16, 2022
Nikhil Mungale Alex Krikos
Related topics:
Linux
Related products:
Red Hat Enterprise Linux

Share:

    Red Hat Enterprise Linux 9.1 brings new features and enhancements that deliver a more secure and consistent foundation for open, hybrid cloud environments and allow organizations to deliver workloads, applications, and services faster and more efficiently. Red Hat Enterprise Linux 9.1 can be downloaded at no cost as a part of the Red Hat Developer Subscription for Individuals.

    This article summarizes some of the ways Red Hat Enterprise Linux 9.1 further improves the developer experience.

    The latest language runtimes and tools

    Many of the most popular languages in enterprise and web development have seen upgrades.

    • Ruby 3.1 is a new release that includes a new experimental in-process just-in-time (JIT) compiler. The JIT achieves both a fast warmup time and performance improvements on most real-world software, producing up to a 22% performance improvement on railsbench and 39% on liquid-render. The new debugger improves performance, including multi-thread and multi-process debugging, without slowing down applications.
    • Maven 3.8 is a new version of the build automation tool used to build, publish, deploy, and manage projects, primarily in Java. To mitigate the risks of domain hijacking and man-in-the-middle (MITM) attacks, Maven 3.8 blocks HTTP access to external repositories, making HTTPS the default access protocol. This restriction adds an additional security layer for applications.
    • .NET 7 is the new version of .NET that brings many improvements in start-up and steady-state performance, as well as OpenTelemetry support. .NET 7, as a part of Red Hat Enterprise Linux 9.1, helps developers build cloud-native applications. With .NET 7, it is easier to modernize applications from legacy .NET versions.
    • Node.js 18 is a new version that includes an update of the V8 JavaScript engine, a global fetch enabled by default, and a core test runner module. Node.js 18 has launched an experimental fetch() API and Web Stream browser-compatible APIs for developers. Another available global API in Node.js 18 is BroadcastChannel, which is dedicated to cross-context communication between multiple tabs of the same origin.
    • PHP 8.1 is a major version update offering many new features, including enums, read-only properties, first-class callable syntax, fibers, intersection types, and performance improvements.

    The latest versions of toolsets and compilers

    Red Hat Enterprise Linux 9.1 is built with GCC 11.3 and offers updated versions of the LLVM (14.0.6), Rust (1.62.1), and Go (1.18.4) toolsets, enabling developers to modernize their applications with the latest compilers and toolsets.

    GCC

    Red Hat Enterprise Linux 9.1 comes with the new GCC Toolset version 12, which features the latest versions of development tools, with bug fixes and enhancements for Annobin and the GDB debugger. GCC 12 is available as an application stream in the form of a software collection in the AppStream repository and has critical bug fixes and enhancements that come from upstream GCC.

    LLVM

    Red Hat Enterprise Linux 9.1 comes with LLVM toolset version 14.0, which comes with notable changes for x86 and ARM architectures:

    • Support for the Intel AVX-512 - FP16 instruction set on the x86_64 architecture.
    • More streamlined support for the latest ARMv9 64-bit architecture than previous versions.
    • Support for -Wdeclaration-after-statement with C99 and later standards, and not just C89, matching GCC's behavior. An important benefit is a support for style guides that forbid mixing declarations and code but want to move to newer C standards.

    For more information on LLVM 14.0, refer to the LLVM 14.0.0 release notes.

    Rust

    Red Hat Enterprise Linux 9.1 comes with Rust 1.62, which has fixed issues related to the compiler and standard library. Notable enhancements in Rust 1.62 include:

    • Support for inline assembly on 64-bit x86 and 64-bit ARM using the core::arch::asm! macro.
    • A custom futex-based implementation in Mutex, CondVar, and RwLock instead of pthreads, with new optimizations made possible by Rust language guarantees.
    • Custom exit codes from main, including user-defined types that implement the newly-stabilized Termination trait.

    Go

    Red Hat Enterprise Linux 9.1 comes with Go 1.18, which adds support for generic types. Go 1.18 includes bug and security fixes to the compiler and standard library. This includes changes in go get, go mod, go mod vendor, and go mod tidy, notably:

    • go get: Does not build or install packages in module-aware mode. Now this command handles only dependencies in go.mod.
    • go mod: Has enhancements in go mod download. It downloads source code only for modules explicitly required in the main module's go.mod file.
    • go mod tidy: Retains additional checksums in the go.sum file for modules whose source code is needed for the imported packages.

    Enhancements for system automation and standardization

    Automation and management capabilities in Red Hat Enterprise Linux 9.1 are provided by the Red Hat Enterprise Linux web console and Red Hat Enterprise Linux system roles. These capabilities help to automate manual tasks, standardize deployment, and provide ease of management in administrative activities.

    Red Hat Enterprise Linux web console

    Red Hat Enterprise Linux web console provides capabilities to view and manage cryptographic policies across systems, to make those systems consistent and protect them from future attacks. Users can edit firewall policies from the web console, including updating or changing port numbers and updating descriptions.

    Red Hat Enterprise Linux system roles

    Red Hat Enterprise Linux provides various system roles, including storage, firewall, network, and Microsoft SQL Server. Some of the benefits enabled by these system roles are:

    • Support for Always On availability: The Microsoft SQL Server system role introduces support for Always On availability groups, enabled through a Red Hat Enterprise Linux high availability add-on. The role can configure synchronous clusters (up to five nodes in SQL Server 2019) to scale read performance and includes support for configuration-only replicas that can reduce cluster licensing costs.
    • Support for thinly-provisioned volumes: Support in the storage system role includes adding and removing disks from storage pools, and the ability to create and attach cache volumes to existing volumes.
    • Support for network configurations: The network system role now supports network configurations using the NMState API, configuring policy-based routing, and configuring IP over Infiniband connections.

    Downloads and more information

    We suggest you check out the following sites:

    • Download RHEL 9.1 at no cost
    • Get started with RHEL 9.1
    • RHEL 9.1 release notes
    • Red Hat's RHEL 9.1 corporate press release

    Try out Red Hat Enterprise Linux 9.1 to deploy applications anywhere from bare metal to edge, and manage applications on a secure platform. Get insights to continuously analyze platforms and applications to predict risk and recommend actions.

    Last updated: August 14, 2023

    Recent Posts

    • More Essential AI tutorials for Node.js Developers

    • How to run a fraud detection AI model on RHEL CVMs

    • How we use software provenance at Red Hat

    • Alternatives to creating bootc images from scratch

    • How to update OpenStack Services on OpenShift

    What’s up next?

    cheat sheet cover image

    Ready to level up your Linux knowledge? The Intermediate Linux Cheat Sheet presents a collection of Linux commands and executables for developers and system administrators who want to move beyond the basics. You’ll find tips on managing processes, users, and groups on Linux, as well as monitoring disk and network usage.

    Get the free cheat sheet
    Red Hat Developers logo LinkedIn YouTube Twitter Facebook

    Products

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform

    Build

    • Developer Sandbox
    • Developer Tools
    • Interactive Tutorials
    • API Catalog

    Quicklinks

    • Learning Resources
    • E-books
    • Cheat Sheets
    • Blog
    • Events
    • Newsletter

    Communicate

    • About us
    • Contact sales
    • Find a partner
    • Report a website issue
    • Site Status Dashboard
    • Report a security problem

    RED HAT DEVELOPER

    Build here. Go anywhere.

    We serve the builders. The problem solvers who create careers with code.

    Join us if you’re a developer, software engineer, web designer, front-end designer, UX designer, computer scientist, architect, tester, product manager, project manager or team lead.

    Sign me up

    Red Hat legal and privacy links

    • About Red Hat
    • Jobs
    • Events
    • Locations
    • Contact Red Hat
    • Red Hat Blog
    • Inclusion at Red Hat
    • Cool Stuff Store
    • Red Hat Summit

    Red Hat legal and privacy links

    • Privacy statement
    • Terms of use
    • All policies and guidelines
    • Digital accessibility

    Report a website issue