Two years of silence, and then siduction came back. Version 2026.1, codenamed Big Crime, landed on 21 October 2026 — a Debian Sid-based rolling distribution that most desktop Linux users have never heard of, and that tux.fan has never covered. This is a good day to fix that.
The name is a wordplay worth spelling out: sid + seduction. sid is Debian’s codename for its Unstable branch, and siduction is a community distribution that rides it directly. If you have used Arch, Fedora Rawhide, or openSUSE Tumbleweed, you already understand the concept — a rolling release where new packages land continuously and you upgrade in place rather than reinstalling. The difference is that siduction’s entire value proposition is how close to Debian Sid you get while still shipping a polished, installable desktop.
Figure: The official siduction 2026.1 “Big Crime” release wallpaper, published by the siduction project under GPLv2.
What actually shipped in 2026.1
The headline numbers, straight from the release announcement:
- Debian Sid snapshot: 18 October 2026
- Kernel: customised Linux 7.2.11
- systemd: 262-1
- KDE edition: Plasma 6.7.4 with KDE Frameworks 6.30 and KDE Gear 26.08.2
- Xfce edition: Xfce 4.20
Four live images are published: KDE, Xfce, Xorg, and noX (a bare system with no graphical environment). GNOME, MATE, and Cinnamon were dropped from this release — the project says plainly that it lacks the maintainers to support them right now. That is a candid admission, and it is the kind of detail you rarely find in vendor marketing.
Kernel 7.2.11 is worth a second look, because it is not the newest kernel in the tree. Linux 7.3 was released officially on 19 October 2026, two days before this siduction build. Siduction ships a patched 7.2 series on purpose: siduction maintains its own kernel branch with additional hardware support, and staying on a slightly older base for one cycle is a deliberate trade for stability. Because the distribution is rolling, Plasma 6.8 and newer kernels will arrive through normal apt upgrade soon anyway — one commenter on the 9to5Linux announcement made exactly that point.
The installer is the real story
The most interesting engineering in this release is not the desktop, it is the installer. siduction 2026.1 introduces a revamped command-line installer that ships in every edition and integrates with systemd-boot.
Maintainer Ferdinand Thommes describes it as a guided flow: the program walks you through configuration, suggests appropriate actions, checks dependencies and prerequisites, explains the settings you have chosen, and can be cancelled at any point. Concretely, it adds:
- Opt-in non-free package sources
- Full UEFI/GPT support
- A consistent interface across all dialogs
- Btrfs support, including creation of siduction’s standard subvolumes
For a distribution whose entire audience is comfortable in a terminal, a CLI-first installer is a coherent choice rather than a compromise. But it is also a notable change for anyone who has installed siduction before — the previous generation of siduction images leaned much harder on Calamares. If you are upgrading an existing machine, the installer is irrelevant to you; if you are installing fresh, this is the part to read about carefully.
Figure: The official siduction GRUB boot theme background for 2026.1 “Big Crime”, published under GPLv2.
The Calamares graphical installer is still present as an option alongside the new CLI tool.
Btrfs gets first-class treatment
siduction has always leaned into Btrfs, and 2026.1 continues that direction with a new Btrfs Assistant application for Btrfs installations, plus an updated siduction-btrfs tool that adds support for a separate boot partition when using GRUB and for the Snapper plugin directory.
If you are rolling with snapshots, this is the release that finally makes Btrfs setup less of a manual project. Siduction’s ISO snapshots are already a distinguishing feature — you can install a dated point-in-time snapshot and upgrade from there, which is an unusually good answer to the classic rolling-release objection of “what do I do when Sid breaks?”
The onoff script and a systemd casualty
One more change deserves attention because it is the kind of detail that only shows up in release notes. A new script called onoff replaces the removed init command, restoring the ability to change the runtime state of a running system in the style of init 0 through init 6.
The underlying init functionality was removed upstream in systemd 258~rc1-1. Debian, and by extension siduction, inherits that removal. The onoff script is a compatibility shim — not a restoration of upstream init, but a local reimplementation that gives you the familiar runlevel-style controls on a modern systemd system. Powering down to runlevel 0 on a systemd box has been a rite of passage for decades; siduction found a way to keep it.
Who should install this?
siduction is a genuinely good fit if:
- You want Debian’s package ecosystem without Debian’s release cadence. You get Sid’s freshness with siduction’s installer and desktop polish.
- You like rolling but want to skip Arch’s manual assembly. There is no
pacman -Sstep-by-step ritual here; you install and you update. - You want a project with an actual community ethos. The tagline on the official wallpaper is literal: “the community based OS”. The project was founded in July 2011 out of the former Aptosid community, and its stated goal is to give back to Debian upstream wherever it makes sense.
Figure: KDE Plasma 6.7.4, the desktop shipped in the siduction 2026.1 KDE edition. Screenshot: kde.org.
Figure: Xfce 4.20, the lightweight alternative available in the separate Xfce edition. Screenshot: xfce.org.
It is a poor fit if you want a system that never changes under you. A rolling release means the kernel, the C library, and the graphics stack can all shift within a week. siduction is candid about this — its own documentation tells users to get comfortable with a terminal, because Debian’s Unstable branch is not a place where a broken package can sit around waiting for a fix.
You should also know that siduction remains x86-64 only. There is no ARM build, no RISC-V build. That rules it out for a Raspberry Pi or an ARM laptop, regardless of how attractive the rest of it looks.
Downloading it
The official site is https://siduction.org/, and the ISO files are mirrored by the project’s infrastructure sponsor IP-Projects. Direct download links for the 2026.1 “Big Crime” images are available from the project’s mirrors — for example, the KDE edition:
https://mirror.math.princeton.edu/pub/siduction/iso/Big_Crime/kde/siduction-2026.1.0-Big_Crime-kde-amd64-202610181233.isoand the same path structure works on the European mirror at ftp.gwdg.de/pub/linux/siduction/. Both carry a .sha256 file alongside each ISO — verify it before you write the image to a USB stick. Image sizes run roughly 3.9 GB for KDE, 3.4 GB for Xfce, and 1.7 GB for the noX edition.
If you are in China, note that siduction is not carried by the major Chinese mirrors — Tsinghua, USTC, and Aliyun do not carry a siduction tree. Plan on the European mirrors and a decent connection, or use the Princeton mirror. That is a real practical consideration, and it is one of the reasons this distribution has stayed under the radar.
To verify your download:
sha256sum -c siduction-2026.1.0-Big_Crime-kde-amd64-202610181233.iso.sha256Upgrading an existing siduction installation
If you are already running siduction, this is the easy path. The rolling model means you do not reinstall to pick up 2026.1:
sudo apt update && sudo apt full-upgradeExpect a kernel bump to 7.2.11, Plasma to 6.7.4, systemd to 262, and the new onoff script appearing on your PATH. Because siduction tracks Debian Sid continuously, your system was already running most of these packages before the ISO was ever cut — the release announcement is a snapshot marker, not a discontinuity.
The bottom line
siduction 2026.1 “Big Crime” is a mature, opinionated rolling distribution that most people never look at twice. It is also the rare Linux project that ships honest release notes: it says which desktops it dropped and why, it admits its kernel is not the newest, and it patches over an upstream systemd removal instead of pretending the change never happened.
The new CLI installer, the first-class Btrfs Assistant, and the onoff shim make this the most polished siduction release to date. If you have been meaning to try a Sid-based rolling distro and were put off by the old installer or by the project’s low profile, this is the release to pick it up on.
Download it from https://siduction.org/ — and check the SHA256 before you boot it.
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