| | {{date|2026-10-10}} |
| | |
| | # Ubuntu in 2026: From Rust-Powered Core Utils to Raspberry Pi Livepatch |
| | |
| | [[File:ubuntu-cof.svg|right|180px|Ubuntu Circle of Friends logo. Public domain.]] |
| | |
| | Ubuntu's 2026 lineup is the most consequential in years. The 11th long-term support release rewrites the security floor with Rust, the Raspberry Pi gets live kernel patching for the first time, and WSL gains a full container runtime that doesn't need Docker. Here's the complete picture. |
| | |
| | --- |
| | |
| | ## Ubuntu 26.04 LTS: Resolute Raccoon |
| | |
| | Released April 23, 2026, Resolute Raccoon is supported until at least 2031 -- or 2038 with Ubuntu Pro and the Legacy add-on[1]. It ships Linux kernel 7.0, GNOME 50, and a stack of changes that affect every layer of the system. |
| | |
| | ### The kernel |
| | |
| | Linux 7.0 is the foundation. Notable changes: |
| | |
| | - **Rust is no longer experimental in the kernel.** The upstream experiment flag is gone; Rust is now a permanent part of the kernel build system[2]. |
| | - **PREEMPT_RT is mainline.** The real-time kernel is available in the main archive for the first time outside Ubuntu Pro[2]. |
| | - **Livepatch now covers ARM64**, not just x86_64. Canonical and the upstream community spent two years building the toolchain prerequisites -- reliable stack trace checks and the consistency model -- needed to hot-swap code on ARM processors[3]. |
| | - **ZFS 2.4.1** and **DOCA-OFED 26.01** kernel modules ship out of the box[2]. |
| | |
| | ```fact |
| | Kernel 7.0 marks the first time Linux's Rust support is classified as stable -- not experimental -- by upstream maintainers. |
| | ``` |
| | |
| | ### GNOME 50 and the Wayland shift |
| | |
| | The X11 GNOME session is gone. Ubuntu 26.04 is Wayland-only[4]. |
| | |
| | What GNOME 50 brings: |
| | |
| | | Feature | Detail | |
| | |---|---| |
| | | Fractional scaling | Enabled by default; optimized to minimize blur | |
| | | VRR | Variable refresh rate no longer experimental | |
| | | HDR | Record and screen-share HDR content natively | |
| | | New default apps | Ptyxis terminal, Resources system monitor (written in Rust), Papers PDF viewer, Loupe image viewer, Showtime video player | |
| | | Reduced Motion | New accessibility toggle to suppress animations | |
| | | Remote desktop | Hardware-accelerated, HiDPI-correct, webcam passthrough | |
| | | Sysprof | Installed by default for performance profiling | |
| | |
| | ```fact |
| | The Resources system monitor -- one of GNOME 50's new defaults -- is written entirely in Rust and can track GPU, NPU, and encoder/decoder usage per-process. |
| | ``` |
| | |
| | ### The Rust oxidation |
| | |
| | This is the headline story for system administrators. Ubuntu 26.04 replaces two foundational components with memory-safe Rust rewrites[5]: |
| | |
| | **sudo-rs** replaces the classic `sudo` binary. It's a complete rewrite that eliminates the class of bugs that produced Baron Samedit (CVE-2021-3156) and similar privilege-escalation CVEs. The command syntax is unchanged. One visible difference: password feedback is now enabled by default (asterisks appear while typing). The original sudo is available as `sudo-ws` if needed. |
| | |
| | **rust-coreutils** replaces the GNU core utilities (`ls`, `cp`, `mv`, `cat`, `base64`, etc.) with the `uutils` Rust implementation. The GNU versions remain accessible with a `gnu` prefix -- run `gnuls` for the classic `ls`. Canonical reports measurable performance improvements, particularly in `base64`. |
| | |
| | ```quote |
| | "Ubuntu 26.04 LTS sets the example for providing best-in-class resilience while simultaneously embracing innovation and the advancement of open source." -- Jon Seager, VP of Ubuntu Engineering at Canonical |
| | ``` |
| | |
| | ### Security highlights |
| | |
| | - **TPM-backed full disk encryption** graduates from experimental to production-ready. The drive can only be decrypted by the hardware it was installed on, with Secure Boot enabled[5]. |
| | - **Post-quantum cryptography**: OpenSSH and OpenSSL use post-quantum algorithms by default[6]. |
| | - **Web servers reject legacy TLS** out of the box[5]. |
| | - **Identity services refuse to run as root**[5]. |
| | - **Confidential computing**: full host and guest support for AMD SEV-SNP and Intel TDX[7]. |
| | |
| | ### AI and GPU compute |
| | |
| | NVIDIA CUDA and AMD ROCm are available directly from the official repositories for the first time in an LTS[4]. Combined with MAAS's new NPU auto-detection for bare-metal provisioning, Ubuntu 26.04 positions itself as the default platform for AI workloads. |
| | |
| | ### Server and infrastructure |
| | |
| | - **LXD** hosts both system containers and VMs from a single daemon. |
| | - **Virtualization HWE stack**: QEMU, libvirt, OVMF, and SeaBIOS now follow a rolling enablement window inside the LTS lifecycle, upgraded every six months for the first two years[7]. |
| - | - **Netplan** continues as the default network stack with improved AD integration, cloud auth against EntraID/Google, and NTS secure time sync[8]. |
| + | - **Netplan** continues as the default network stack with improved AD integration, cloud auth against EntraID/[[Google|Google]], and NTS secure time sync[8]. |
| | - **IgH EtherCAT Master** is integrated into the kernel for industrial real-time networking[4]. |
| | |
| | --- |
| | |
| | ## Ubuntu on Raspberry Pi |
| | |
| | [[File:raspberry-pi-5.jpg|right|250px|Raspberry Pi 5. Photo by SparkFun Electronics, CC BY 2.0.]] |
| | |
| | The Pi story in 2026 has two parts: broader board support and a historic security upgrade. |
| | |
| | ### Board support matrix (26.04 LTS) |
| | |
| | | Board | Server | Desktop | Compute Module | |
| | |---|---|---|---| |
| | | Pi 3B/3B+/3A+ | Yes | -- | -- | |
| | | Pi 4B | Yes | Yes | CM4: Yes | |
| | | Pi 400 | Yes | Yes | -- | |
| | | Pi 5 | Yes | Yes | -- | |
| | | Pi 500 | Yes | Yes | -- | |
| | | Zero 2W | Yes | -- | -- | |
| | |
| | Desktop images now ship as a dedicated ARM64 ISO -- no longer just a preinstalled SD card image[4]. The Pi 5 and Pi 4B run GNOME on Wayland with reasonable performance on 4GB+ models. |
| | |
| | ### ARM64 goes first-class |
| | |
| | Starting with 26.04, ARM64 packages have moved from `ports.ubuntu.com` to the main `archive.ubuntu.com`. This means proper mirror distribution, faster downloads, and the same infrastructure treatment as x86_64[9]. ARM64 is no longer a "ports" architecture. |
| | |
| | ### Livepatch for ARM64 |
| | |
| | On June 23, 2026, Canonical announced live kernel patching for ARM64 servers[3]. This is the first time any major Linux distribution has offered rebootless kernel security fixes on ARM. The technical prerequisites -- upstream stack trace checks, the ARM64 consistency model, and the toolchain for producing loadable cumulative kernel modules on ARM -- took over two years to land. |
| | |
| | For Raspberry Pi users running Ubuntu Server on Pi 4/5 in production (home servers, edge nodes, IoT gateways), this means critical kernel CVEs can be patched without downtime. |
| | |
| | ```fact |
| | Ubuntu 26.04 is the first major Linux distribution to offer live kernel patching on ARM64 processors, closing a gap that existed since Livepatch launched for x86_64 in 2016. |
| | ``` |
| | |
| | --- |
| | |
| | ## Ubuntu on WSL |
| | |
| | The WSL story in 2026 is dominated by one announcement: **WSL Containers hit general availability** on September 29, 2026[10]. |
| | |
| | ### WSL Containers (WSLC) |
| | |
| | Microsoft shipped `wslc.exe` -- a built-in CLI for building, running, and managing Linux containers directly on Windows, without Docker Desktop. Key capabilities: |
| | |
| | | Command | Purpose | |
| | |---|---| |
| | | `wslc run` | Run a container from an image | |
| | | `wslc build` | Build a container image | |
| | | `wslc container cp` | Copy files in/out via tar | |
| | | `wslc system info` | Environment state at a glance | |
| | | `wslc network connect/disconnect` | Attach/detach containers from networks | |
| | | `wslc events` | Stream real-time container activity | |
| | | `container.exe` | Built-in alias for familiar syntax | |
| | |
| | There's also a **WSL Containers API** (NuGet package `Microsoft.WSL.Containers`) for running Linux containers programmatically from native Windows apps -- C# and C++/WinRT[10]. |
| | |
| | Enterprise controls ship on day one: Microsoft Intune can enable/disable the container feature and restrict image pulls to approved registries. Microsoft Defender for Endpoint extends its coverage to container workloads inside WSL[10]. |
| | |
| | ### Architecture |
| | |
| | WSLC runs containers in a separate lightweight VM from your WSL distros. Each session gets its own `wslcsession.exe` process and storage VHD. File mounts use virtiofs for high-performance host/guest I/O. Networking uses a dedicated virtual switch with port mapping to the host[11]. |
| | |
| | ### WSL 3.0 |
| | |
| | WSL itself hit version 3.0 in late 2026, with automatic virtual NUMA support for large servers (fixing launch failures on machines with 256+ threads) and experimental sparse VHD creation that only consumes disk space for data actually written[12]. |
| | |
| | ### Ubuntu Pro on WSL |
| | |
| | Ubuntu 26.04 on WSL integrates `cloud-init` and Ubuntu Pro, meaning enterprise users can attach their WSL instances to their Pro subscription for ESM security updates, FIPS compliance, and Livepatch -- the same coverage as bare-metal and cloud instances[4]. |
| | |
| | --- |
| | |
| | ## What this means |
| | |
| | Three threads run through all of 2026's Ubuntu releases: |
| | |
| | 1. **Memory safety is no longer optional.** Rust coreutils, sudo-rs, a Rust-native system monitor, and Rust as a permanent kernel language -- Canonical is systematically replacing C in security-critical paths. The GNU originals are still there, but the defaults have shifted. |
| | |
| | 2. **ARM64 is a first-class citizen.** Archive migration, Livepatch, desktop ISOs, Pi 5 support -- the infrastructure gap between x86_64 and ARM64 is effectively closed. |
| | |
| | 3. **Containers everywhere.** LXD on the server, WSLC on the desktop, Intune/Defender in the enterprise. The container is becoming the default deployment unit regardless of where Ubuntu runs. |
| | |
| | For anyone choosing a Linux distribution for the next five years of production workloads, Ubuntu 26.04 LTS makes a compelling case. The security floor is materially higher, the hardware coverage is broader, and the tooling -- from kernel to container to IDE -- is more coherent than any previous release. |
| | |
| | ``` |
| | sudo apt update && sudo apt full-upgrade |
| | ``` |
| | |
| | Or on a fresh install: |
| | |
| | ``` |
| | https://ubuntu.com/download |
| | ``` |
| | |
| | --- |
| | |
| | ## References |
| | |
| | [1] Canonical, "Ubuntu 26.04 LTS Release Notes," documentation.ubuntu.com, April 2026. |
| | [2] Ubuntu Release Team, "Ubuntu 26.04 LTS Changes Since 25.10," documentation.ubuntu.com, April 2026. |
| | [3] Canonical, "Canonical Announces Live Kernel Patching for Arm64," canonical.com/blog, June 2026. |
| | [4] Canonical, "Canonical Releases Ubuntu 26.04 LTS Resolute Raccoon," canonical.com/blog, April 2026. |
| | [5] Canonical, "What's New in Security for Ubuntu 26.04 LTS?", ubuntu.com/blog, April 2026. |
| | [6] Serverspace, "Ubuntu 26.04 LTS Resolute Raccoon: A Complete Guide to What's New," serverspace.io, March 2026. |
| | [7] Canonical, "Ubuntu's Virtualization HWE Stack," ubuntu.com/blog, 2026. |
| | [8] Ubuntu Release Team, "Ubuntu 25.04 Release Notes," documentation.ubuntu.com, April 2025. |
| | [9] Ravi (Ubuntu Architectures Team), "Ubuntu on ARM: Summer '26 Update," discourse.ubuntu.com, June 2026. |
| | [10] Logan Iyer, "WSL Containers Is Now Generally Available," blogs.windows.com/windowsdeveloper, September 2026. |
| | [11] Microsoft, "WSLC Architecture Deep Dive," devblogs.microsoft.com/commandline, September 2026. |
| | [12] Phoronix, "Windows Subsystem For Linux Can Now Run On Very Large Servers," phoronix.com, October 2026. |
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| | [[Category:News]] |
| | [[Category:Programming]] |
| | [[Category:Linux]] |
| | |
