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PODCAST

Chaos Computer Club - recent events feed

Der Chaos Computer Club ist die größte europäische Hackervereinigung, und seit über 25 Jahren Vermittler im Spannungsfeld technischer und sozialer Entwicklungen.

technology

All Episodes

00:26:05

GNOME OS' prêt-à-booter image (asg2025)

Chaos Computer Club - recent events feed ·

2025/10/01

GNOME OS is a distribution based around systemd-sysupdate. This year, we finally created a live installer image using the same /usr partition as the installed OS. The main innovation however is the ability to install without the need to reboot. The user can start working while the installation is happening. This live image is built using systemd-repart. And the installer itself also uses systemd-repart. But systemd-repart is not the complete solution and we had to solve some challenges. Licensed

00:41:53

Unprivileged Containers, with Transient User...

Chaos Computer Club - recent events feed ·

2025/10/01

Many traditional container engines make use of the "subuid" concept and the "newuidmap" tool to implement a concept of "unprivileged" user-namespace containers on Linux. This approach has many shortcomings in my PoV, from both a security and scalability standpoint. Recent systemd versions provide a more powerful, more secure, mor scalable alternative, via systemd-nsresourced, systemd-mountfsd and other components. In this talk I want to shed some light on the problems with the "old ways", and in

00:27:58

Shipping Flatpak applications with an image based...

Chaos Computer Club - recent events feed ·

2025/10/01

Flatpak is the de-facto standard for distributing desktop applications across various Linux based systems. It also offers other advantages such as sandboxing. It is particularly useful for image based systems as it installs the applications into a separate location and doesn't try to modify the system. GNOME OS is GNOME's development, testing and QA operating system. It builds the latest and greatest in-development versions of the GNOME desktop and core applications. It is also Linux based system

00:03:08

oo7-daemon: One year later – Progress, Challenges,...

Chaos Computer Club - recent events feed ·

2025/09/30

oo7-daemon is the new D-Bus Secret Service provider that aims to fully replace gnome-keyring. In this followup (continuation of my 2024 talk) lightning talk, I will go through the progress made, the challenges faced and the status of systemd credentials integration. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2025/talk/NFNFJS/

00:06:55

From initramfs-tools to mkosi-initrd (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Marco will review the features available in the initramfs-tools ecosystem, the initrd generator used by Debian and Ubuntu, and how they can be implemented (or not) by adopting mkosi-initrd. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2025/talk/E989ZX/

00:27:25

A new systemd container runtime?! (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

At Meta, we've been looking to revamp our internal container runtime (Twine). Instead of maintaining all the low level container runtime code ourselves, we'd much prefer having more of this managed by systemd. This talk will go over what we did to make systemd transient units a suitable environment for running system containers (pid namespace support, cgroup namespace support, namespace delegation, ...), and why we went this route instead of reusing systemd-nspawn. Licensed to the public under

00:19:42

isd: interactive systemd (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Simplify systemd management with `isd`! `isd` is a TUI offering fuzzy search for units, auto-refreshing previews, smart sudo handling, and a fully customizable interface for power-users and newcomers alike. If you ever became frustrated while typing: - `systemctl start --user unit-A.service` (manually starting a unit) - `systemctl status --user unit-A.service` (seeing that it failed) - `journalctl -xe --user -u unit-A.service` (checking the logs) - `systemctl edit --user unit-A.service` (updating

00:21:40

Verification of OS artifacts without stateful...

Chaos Computer Club - recent events feed ·

2025/09/30

Many OS artifacts today are still verified using proprietary, stateful keyring formats. With the "File Hierarchy for the Verification of OS Artifacts (VOA)" an attempt is made to rid the ecosystem of this limitation by implementing a generic lookup directory. With extensibility in mind, this unifying hierarchy currently provides integration for OpenPGP, with further integrations in planning. While working on improvements to the [ALPM](https://alpm.archlinux.page) ecosystem, the way packages and

00:39:39

A simpler and faster firewall with bpfilter (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

For many years, firewall solutions on Linux have grown and evolved, without any major change, until eBPF. While eBPF can allow very fast and efficient packet filtering, the learning curve doesn't make it easily accessible to non-developers. bpfilter aims to bridge the gap between existing tools (nftables, iptables) and modern technologies such as eBPF. By translating filtering rules into native code, bpfilter abstracts the complexity behind cutting-edge kernel technologies while maintaining

00:37:46

ParticleOS: Why is Lennart still not dogfooding...

Chaos Computer Club - recent events feed ·

2025/09/30

More than six months have passed since Daan tried to ~~shame~~ gently peer pressure Lennart to actually use the stuff he builds, via a FOSDEM talk: https://fosdem.org/2025/schedule/event/fosdem-2025-4057-particleos-can-we-make-lennart-poettering-run-an-image-based-distribution-/ Did he succeed? Is dogfooding standard practice now in the systemd development process? Or do things like randomly breaking logging in GNOME (*cough*) still happen from time to time? Join us for this talk to find out, and

00:25:01

Sandboxing services with Landlock (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Landlock is an unprivileged kernel feature that enables all Linux users to sandbox their processes. Complementary to seccomp, developers can leverage Landlock to restrict their programs in a fine-grained way. While Landlock can be used by end users through sandboxer tools, there is currently no well-integrated solution to define security policies tailored to system services. Although AppArmor and seccomp security policies can already be tied to a system unit, we aim to provide a more dynamic,

00:26:19

Integrating systemd-sysext images in an update stack...

Chaos Computer Club - recent events feed ·

2025/09/30

systemd-sysext provides a nice way to enhance a distribution with a read-only root filesystem without the need to reboot. But there is additional tooling necessary to manage the sysext images: * install an image which is compatible with the installed OS version * update installed images to the newest compatible version * rollback images in case of an OS rollback * cleanup unneeded images In this presentation I will talk about which tooling systemd itself provides for this (importctl, updatectl,

00:25:54

Extending Fedora Atomic Desktops using systemd system...

Chaos Computer Club - recent events feed ·

2025/09/30

On image based desktops distributions such as Fedora Atomic desktops and Universal Blue, users are expected to run their graphical applications using Flatpaks and their command line ones using containers. But that approach does not work well for some applications that require more privileges, direct access to devices or kernel interfaces. With systemd system extensions (sysexts), it is possible to extend an image based system on demand. Sysexts come with a lot of advantages: they can be created out

00:27:35

Look ma, no secrets! - bootstrapping cryptographic...

Chaos Computer Club - recent events feed ·

2025/09/30

All the big cloud providers provide your machines with a unique cryptographic identity that can be used to talk to their cloud services securely without having to manage or rotate any cryptographic secrets yourself. For example GCP has Service accounts and AWS has IAM roles. This ubiquity of cloud identity and the seamless integration with all the the services of these cloud providers is one of the reasons why they are so successful. SPIFFE (Secure Production Identity Framework For Everyone)

00:25:45

systemd-confext Two Years On: Versioned Overlays for...

Chaos Computer Club - recent events feed ·

2025/09/30

systemd-confext is a lightweight overlay mechanism for /etc, allowing you to drop in a configuration extension ("confext") bundle and let systemd make it visible to your service as though it was already shipped with the base image. Building on the same extension magic as systemd-sysext, confext also introduces extra features tailored for the /etc use case, such as vpick-ing the newest version and the ability to pick up config revisions with a `systemctl reload`. This talk presents the changes to

00:26:12

Accessing shadow records via varlink (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Provide a varlink service to access /etc/passwd and /etc/shadow so that no setuid and setgid binaries are necessary for this task. There are two independent "problems" which can be solved with the same idea: all files in /usr should be owned by root:root and no setuid binary should be needed. The first one is a requirement of image based updates of /usr to avoid UID/GID drift, the second one is a security feature wished by systemd developers and security teams. Currently most setuid binaries (or

00:28:12

systemd: round table (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Let's have an open discussion with systemd developers who are at ASG and users in the audience. We will open with the developers saying what they plan to work on in the near future, and then allow questions / comments from the audience. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2025/talk/PXZGEL/

00:24:03

How I optimized away 94% CPU from zbus (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Haven’t you ever wanted to find ways to make your Rust code the most optimal in the world? I know how you feel. This is a talk, where I’d tell you how easy it is to profile your Rust software and how most often the solutions are trivial. This is a story of how I used a few readily-available Open Source tools to achieve huge optimizations in [zbus](https://crates.io/crates/zbus), a pure Rust D-Bus library. This was long journey but gains were worth the efforts. I will go through each single

00:21:47

systemd: state of the project (asg2025)

Chaos Computer Club - recent events feed ·

2025/09/30

Same as every year, a lot has happened in the systemd project since last year's ASG. We released multiple versions, packed with new components and features. This talk will provide an overview of these changes, commenting on successes and challenges, and a sneak peak at what lies ahead. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2025/talk/B8RVCJ/

00:25:57

Linux IPC: Lost between Threading and Networking...

Chaos Computer Club - recent events feed ·

2025/09/30

Communication is paramount in modern application development. This applies equally well to the process of writing applications and to the code itself. The complexity of the tasks ahead of us calls for a distributed and coordinated development effort, and this often manifests in our code: We design distributed, communicating systems to split complexity and responsibility among many people and teams, and at the same time meet the demand for ever faster systems. The last decade showed significantly

1,883 results

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