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Quarkos is a desktop Linux distribution based on Ubuntu's long-term support branch, with a choice of two user interfaces - the modern KDE Plasma desktop or the lightweight Trinity desktop environment (a fork of KDE 3.5). It is a sister project of the Debian-based Q4OS distribution.

The Amnesic Incognito Live System (Tails) is a Debian-based live DVD/USB with the goal of providing complete Internet anonymity for the user. The product ships with several Internet applications, including web browser, IRC client, mail client and instant messenger, all pre-configured with security in mind and with all traffic anonymised. To achieve this, Incognito uses the Tor network to make Internet traffic very hard to trace.

Porteus is a fast, portable and modular live CD/USB medium based on Slackware Linux. The distribution started as a community remix of Slax, another Slackware-based live CD, with KDE 3 as the default desktop for the i486 edition and a stripped-down KDE 4 as the desktop environment for the x86_64 flavour. There are now several desktop flavours of the distribution, which include editions running Cinnamon, GNOME, KDE Plasma, LXQt, MATE, and Xfce.

MODICIA O.S. is a Linux multimedia distribution designed primarily for musicians, graphic designers and video makers. It is based on Debian's "stable" branch, but uses the Cinnamon desktop and a recent Linux kernel. MODICIA O.S. comes with a set of carefully-selected, open-source multimedia software and tools, such as Audacity (audio editor), Brasero (disc-burning utility), Cheese (webcam application), Curlew (multimedia converter), GIMP (graphics editor), HandBrake (video transcoder), Kdenlive (video editor), MediaInfo (tool that provides technical data about media files), mpv (media player), Peek (animated GIF recorder), RawTherapee (photo processor), XnView (image viewer), and many others. The distribution also integrates the OnlyOffice software suite for general office tasks.

"Reclaim" is the task of finding memory that can be taken away from its current user and put to better uses within the system; it is a core part of the memory-management picture. The addition of the multi-generational LRU (MGLRU) was meant to provide a better reclaim implementation than the "traditional LRU" that preceded it, but MGLRU has complicated the situation instead. No fewer than three memory-management-track sessions at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit were focused on MGLRU, with an eye toward integrating it more fully, improving its performance, and addressing some problems encountered with Android systems.

Security updates have been issued by AlmaLinux (kernel, libpng, nginx, nginx:1.24, ruby, and ruby:3.3), Debian (gnutls28 and linux-6.1), Fedora (dnsmasq, kernel, keylime-agent-rust, perl-Net-CIDR-Lite, python-pysam, python-urllib3, rust-cargo-vendor-filterer, rust-ingredients, rust-oo7-cli, rust-rpki, rust-sevctl, and rust-tealdeer), Mageia (bind), Oracle (bind, giflib, gimp:2.8, kernel, libpng, rsync, ruby, and vim), Slackware (haveged and mozilla), SUSE (cockpit, dnsmasq, erlang26, freeipmi, git-bug, glibc, GraphicsMagick, haveged, ImageMagick, iproute2, kernel, openssh, perl-CryptX, perl-HTTP-Tiny, postgresql14, postgresql15, postgresql16, python-Pillow, rsync, tiff, and traefik), and Ubuntu (Highlight.js, linux, linux-aws, linux-aws-5.15, linux-aws-fips, linux-fips, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-oracle, linux-raspi, linux-realtime, linux, linux-aws, linux-aws-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp, linux, linux-aws, linux-aws-fips, linux-fips, linux-gcp-4.15, linux-gcp-fips, linux-kvm, linux-oracle, linux, linux-aws, linux-aws-fips, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-raspi, linux-raspi-realtime, linux-realtime, linux-realtime-6.8, linux, linux-aws, linux-hwe-6.17, linux-oem-6.17, linux-oracle, linux-raspi, linux-realtime, linux-realtime-6.17, and smarty3).

Version:next-20260520 (linux-next) Released:2026-05-20

The OpenPGP Email Summit is an annual meeting for those who work on encrypted email and related topics. The tenth installment of this meeting took place in March 2026 and the minutes have now been published. As usual, a wide range of topics were discussed. Highlights included support for post-quantum cryptography (PQC) with multiple actors planning rollouts within this year, a promising new approach for making email signatures ubiquitous with the plan of making OpenPGP signed email a default, a new draft that brings reliable deletion (or "forward secrecy") features to OpenPGP, as well as a plan for transferring ownership of the OpenPGP.org domain.

Window Maker Live is a Debian-based Linux distribution that applies the Window Maker window manager as the default graphical user interface and integrates well-known open-source components in an attractive and usable user interface. The distribution includes integrated GNOME components.

Hardenwing OS (formerly Hardened Slarpx) is a security-focused Linux distribution based on Debian's "Stable" branch. It adopts a multi-layered defense architecture against cyber attacks, incorporating aggressive mitigation techniques alongside kernel, system and network-hardening configurations. The distribution offers comprehensive security measures, including BadUSB protection, permission-hardening services, package manager hardening, module blacklisting, PAM and sudoers hardening. Due to its strict firewall policy, anonymisation tools are not supported; the system enforces Quad9 DNS and allows only basic internet access. Hardenwing OS boots into the standard Debian Installer which installs a customised GNOME desktop with Wayland display server.

Gnoppix AI Linux is a Debian-based distribution which can be run from a USB thumb drive or from a local drive. It is pre-loaded with essential Artificial Intelligence (AI) frameworks, libraries and development tools. It uses several popular desktop environments, including GNOME, KDE Plasma and Xfce. The project is an attempt to revive a Knoppix-based live distribution with the GNOME desktop that was first launched back in 2002.

Armbian is a Linux distribution designed for ARM development boards. It is usually based on one of the stable or development versions of Debian or Ubuntu and it supports a wide variety of popular ARM-based devices, including Banana Pi, Cubieboard, Olimex, Orange Pi, Odroid, Pine64 and others. Armbian includes a menu-driven configuration tool along with stock Debian utilities, the Bash shell, and a choice of Cinnamon or Xfce desktop.

Br OS is a Brazilian Linux distribution based on Debian and featuring the KDE Plasma desktop. It is designed as an intuitive, easy-to-use, general-purpose operating system for web navigation and content creation, providing a selection of useful applications for daily use.

TileOS is a Debian-based desktop Linux distribution featuring a selection of several Wayland tiling compositors, notably Sway, River, Qtile and miracle-wm. It is based on the latest stable Debian release, with some packages, such as the Mesa graphics drivers, back-ported from Debian's "Testing" repository. The distribution comes with many device drivers and non-free firmware included in the base system, some performance optimizations and system tweaks, additional repositories for installing programs not found in Debian (such as OnlyOffice, VirtualBox, Librewolf, Visual Studio Code and Brave), and the Calamares system installer.

Version 151.0 of the Firefox browser has been released. Significant changes include the ability to clear and restart a private-browsing session, better fingerprinting protection, control over the apparent location when using the Firefox VPN, and more.

Many people in the Linux community began using the operating system—and contributing to open source—at a tender age, often well before their 16th birthday. Thus, a recent change in openSUSE's terms of site (ToS) that required users of the project's web site to be "at least 16 years of age or the age of majority" in their jurisdiction has raised objections. The terms have since been modified, though users must still have parental approval to create accounts if they are younger than 16.

The kernel's this_cpu operations are meant to speed access to per-CPU variables. They are more optimal on some CPUs than others, though. During a memory-management-track session at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Yang Shi proposed a fundamental, and somewhat controversial, change to how these operations work in order to provide better performance on a wider range of architectures.

Compute Express Link (CXL) is a technology intended to enable the provision of "memory nodes" in data centers that provide (possibly shared) memory to nearby CPUs. It has, Dan Williams said at the beginning of his memory-management-track session on the topic at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, "been making memory-management problems worse since 2021". He used the session to provide an overview of the ways in which CXL can be expected to extend that record into the future.

There are many places in the kernel where performance can be improved by using per-CPU data. But, as it turns out, the kernel's allocator for per-CPU data has some performance problems of its own. Harry Yoo led a session in the memory-management track of the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit to explore ways to address those problems and accelerate the allocation and initialization of per-CPU data.

Security updates have been issued by AlmaLinux (libpng and nginx), Debian (erlang, netatalk, and nginx), Fedora (mod_md and SDL2_image), Mageia (perl-libwww-perl, perl-HTTP-Message, perl-WWW-Mechanize-Cached, perl-File-XDG, perl-Path-Tiny, perl-YAML-Syck, postgresql15, and rclone), SUSE (agama, alloy, cacti, cloud-init, dnsmasq, emacs, firefox, glibc, go1.25, go1.26, google-cloud-sap-agent, google-guest-agent, ibus-rime, librime, imagemagick, kernel, libsndfile, nginx, ongres-scram, ongres-stringprep, plexus-testing,, openexr, openssh, PackageKit, perl-Text-CSV_XS, php-composer2, php8, postgresql16, postgresql18, python-lxml, python-python-multipart, python3, python311-urllib3, rmt-server, rsync, tiff, tree-sitter, util-linux, and xen), and Ubuntu (linux, linux-aws, linux-aws-5.4, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp, linux, linux-aws, linux-kvm, linux-lts-xenial, linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-raspi, and linux-xilinx-zynqmp).