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How Container Filesystem Works: Building a Docker-Like Container from Scratch

news.ycombinator.com Ivan Velichko 2025-09-18 09:37:52

One of the superpowers of containers is their isolated filesystem view - from inside a container it can look like a full Linux distro, often different from the host. Run docker run nginx , and Nginx lands in its familiar Debian userspace no matter what Linux flavor your host runs. But how is that illusion built? In this post, we'll assemble a tiny but realistic, Docker-like container using only stock Linux tools: unshare , mount , and pivot_root . No runtime magic and (almost) no cut corners. A

Topics: clipboard container copy dev mount

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Show HN: Pooshit – Sync local code to remote Docker containers

news.ycombinator.com Unknown 2025-09-22 18:46:19

Pronounced Push-It.... I'm a lazy developer for the most part, so this is for people like me. Sometimes I just want my local code running in live remote containers quickly, without building images and syncing to cloud docker repos or setting up git workflows or any of the other draining ways to get your code running remotely. With pooshit (and a simple config file), you can simply push your local dev files to a remote folder on a VM then automatically remove relevant running containers, then b

Topics: code containers docker like running

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Show HN: Pooshit – sync local code to remote Docker containers

news.ycombinator.com Unknown 2025-09-23 04:46:19

Pronounced Push-It.... I'm a lazy developer for the most part, so this is for people like me. Sometimes I just want my local code running in live remote containers quickly, without building images and syncing to cloud docker repos or setting up git workflows or any of the other draining ways to get your code running remotely. With pooshit (and a simple config file), you can simply push your local dev files to a remote folder on a VM then automatically remove relevant running containers, then b

Topics: code containers docker like running

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Will AI be the basis of many future industrial fortunes, or a net loser?

news.ycombinator.com Jerry Neumann 2025-09-24 18:01:35

Fortunes are made by entrepreneurs and investors when revolutionary technologies enable waves of innovative, investable companies. Think of the railroad, the Bessemer process, electric power, the internal combustion engine, or the microprocessor—each of which, like a stray spark in a fireworks factory, set off decades of follow-on innovations, permeated every part of society, and catapulted a new set of inventors and investors into power, influence, and wealth. Yet some technological innovation

Topics: ai companies containerization like new

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AI Will Not Make You Rich

news.ycombinator.com Jerry Neumann 2025-09-24 23:01:35

Fortunes are made by entrepreneurs and investors when revolutionary technologies enable waves of innovative, investable companies. Think of the railroad, the Bessemer process, electric power, the internal combustion engine, or the microprocessor—each of which, like a stray spark in a fireworks factory, set off decades of follow-on innovations, permeated every part of society, and catapulted a new set of inventors and investors into power, influence, and wealth. Yet some technological innovation

Topics: ai companies containerization like new

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Hackers hide behind Tor in exposed Docker API breaches

bleepingcomputer.com Unknown 2025-10-02 17:16:30

A threat actor targeting exposed Docker APIs has updated its malicious tooling with more dangerous functionality that could lay the foundation for a complex botnet. The activity was first reported in June by cybersecurity company Trend Micro. whose researchers analyzed scripts and malicious code that dropped a cryptominer and relied on the Tor network to hide their identity. Akamai researchers discovered new tooling that does not deploy a miner but a more complex payload that can block access

Topics: akamai binary container docker tor

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I ditched Docker for Podman

news.ycombinator.com Dominik Szymański 2025-10-07 03:56:59

Beginnings I'm old enough to remember when Vagrant looked like a promised land where every development environment would look the same. Differences between language versions, as well as some unusual OS version differences, resulted in a few days of unproductive debugging of your development environment. I've had similar excitement when I started my first Docker Swarm (who uses that these days?!) - it felt revolutionary. Docker wasn't just a tool - it fundamentally changed how we thought about a

Topics: container docker fastapi just podman

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I Ditched Docker for Podman (and You Should Too)

news.ycombinator.com Dominik Szymański 2025-10-08 04:56:59

Beginnings I'm old enough to remember when Vagrant looked like a promised land where every development environment would look the same. Differences between language versions, as well as some unusual OS version differences, resulted in a few days of unproductive debugging of your development environment. I've had similar excitement when I started my first Docker Swarm (who uses that these days?!) - it felt revolutionary. Docker wasn't just a tool - it fundamentally changed how we thought about a

Topics: container docker fastapi just podman

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Takeout Containers Should Never Go in the Microwave. This Is Why

cnet.com See Full Bio 2025-10-10 04:32:00

When hunger and laziness coincide, reheating last night's leftovers in the microwave seems like a great idea. But if you reheat them in the plastic container they came in, you put yourself at risk for ingesting microplastics and harmful chemicals. You may be wondering, "Is plastic contamination as dangerous as experts say?" Unfortunately, all signs point to yes. Study after study has shown that the resulting chemical exposure of microplastics could pose significant health risks and they have be

Topics: containers food plastic reheat safe

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About Containers and VMs

news.ycombinator.com Unknown 2025-10-19 12:58:56

About containers and VMs¶ Incus provides support for two different types of instances: system containers and virtual machines. Incus uses features of the Linux kernel (such as namespaces and cgroups ) in the implementation of system containers. These features provide a software-only way to isolate and restrict a running system container. A system container can only be based on the Linux kernel. When running a virtual machine, Incus uses hardware features of the the host system as a way to iso

Topics: application containers host incus uses

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Critical Docker Desktop flaw lets attackers hijack Windows hosts

bleepingcomputer.com Unknown 2025-10-28 04:11:51

A critical vulnerability in Docker Desktop for Windows and macOS allows compromising the host by running a malicious container, even if the Enhanced Container Isolation (ECI) protection is active. The security issue is a server-side request forgery (SSRF) now identified as CVE-2025-9074, and it received a critical severity rating of 9.3. “A malicious container running on Docker Desktop could access the Docker Engine and launch additional containers without requiring the Docker socket to be mou

Topics: container docker macos vulnerability windows

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Even More Shrimp Just Got Recalled Because of Radiation, at More Grocery Stores

futurism.com Unknown 2025-10-29 03:12:53

Image by Getty / Futurism Developments Alas, nuclear waste may have seeped into a greater share of delectable sea bugs than initially believed. On Thursday, the US Food and Drug Administration said that even more bags of frozen shrimp are being recalled for possible radioactive contamination after another company, Southwind Foods, voluntarily pulled its product. "I think they're doing the recall as a precautionary approach," Barbara Kowalcyk, director of the Institute for Food Safety and Nutr

Topics: 137 containers fda product shrimp

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How Did Walmart Frozen Shrimp Become Contaminated With Radioactive Material?

futurism.com Unknown 2025-11-03 21:44:05

As you've probably already heard, the Food and Drug Administration has issued a recall warning for bags of frozen shrimp sold under Walmart's "Great Value" brand over concerns about radioactive contamination. As the FDA explained in a statement, shipping containers and frozen shrimp parcels used by the Indonesia-based Walmart contractor BMS Foods tested positive for Cesium-137, a radioactive isotope and byproduct of nuclear fission. Though only a single shipment of the shrimp was found to cont

Topics: containers contamination fda radioactive shrimp

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Docker container for running Claude Code in "dangerously skip permissions" mode

news.ycombinator.com Unknown 2025-11-04 23:34:36

Claude Code Container A Docker container for running Claude Code in "dangerously skip permissions" mode. claude-container3.mp4 Build the docker container and execute run_claude.sh to run an isolated version of claude code with access to the current working dir ( readOnly:/workspace/input ). /workspace/ ├── input/ # Host input files (read-only mount of $PWD) ├── output/ # Analysis results (writable mount to host) ├── data/ # Reference data (optional read-only mount) ├── temp/ # Temporary file

Topics: claude code container mcp sh

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Comparison of different C libraries providing generic containers capabilities

news.ycombinator.com Unknown 2025-11-05 17:45:15

Introduction The goal of this project is to compare several C libraries that provide some STL like capabilities of the C++ (container template) but are targeting classic C language. A STL like library for C is a C library providing several classic generic containers for the C language, like vector, list, sorted set, unordered_map, and so on. A small benchmark to compare their performance is includes in the bench directory. To do this, the same simple programs will be implemented by the librar

Topics: array basic container support type

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Show HN: Trayce – Burp Suite for developers

news.ycombinator.com Unknown 2025-11-23 06:49:32

How does container monitoring work? The TrayceAgent container runs along side your existing containers. The agent uses eBPF probes to intercept network requests and send them back to the GUI to be displayed. Protocols Supported: HTTP HTTPS (for Go and OpenSSL-based languages like Python, Ruby etc.) GRPC MySQL Postgres Who is it for? Trayce container monitoring is intended for anyone wanting to see whats going on inside their local Docker containers: backend developers, QA engineers, tes

Topics: based container containers intended monitoring

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I want everything local – Building my offline AI workspace

news.ycombinator.com Unknown 2025-11-24 22:19:05

I want everything local — no cloud, no remote code execution. That’s what a friend said. That one-line requirement, albeit simple, would need multiple things to work in tandem to make it happen. What does a mainstream LLM (Large Language Model) chat app like ChatGPT or Claude provide at a high level? Ability to use chat with a cloud hosted LLM, Ability to run code generated by them mostly on their cloud infra, sometimes locally via shell, Ability to access the internet for new content or se

Topics: code container local models tool

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Show HN: Trayce – “Burp Suite for developers”

news.ycombinator.com Unknown 2025-11-25 00:49:32

How does container monitoring work? The TrayceAgent container runs along side your existing containers. The agent uses eBPF probes to intercept network requests and send them back to the GUI to be displayed. Protocols Supported: HTTP HTTPS (for Go and OpenSSL-based languages like Python, Ruby etc.) GRPC MySQL Postgres Who is it for? Trayce container monitoring is intended for anyone wanting to see whats going on inside their local Docker containers: backend developers, QA engineers, tes

Topics: based container containers intended monitoring

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Kali Linux can now run in Apple containers on macOS systems

bleepingcomputer.com Unknown 2025-12-11 08:46:11

Cybersecurity professionals and researchers can now launch Kali Linux in a virtualized container on macOS Sequoia using Apple's new containerization framework. During WWDC 2025, Apple announced a new containerization framework that allows Apple Silicon hardware to run isolated Linux distros in its virtualized environment, similar to Microsoft Windows Subsystem for Linux 2 (WSL2). To get started, users on macOS Sequoia with Apple Silicon can install the container CLI via Homebrew and initialize

Topics: apple container kali linux macos

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What is gVisor?

news.ycombinator.com Unknown 2025-12-12 08:40:22

It has been a really long time since I last wrote something here as life happens, things get busier, etc etc. I am now trying to get back into writing things down and here we go! So, imagine a tool or a service that allows you to run some arbitrary code via a shell. Either through a ssh or more commonly, via a web terminal. How does these tools isolate your code from other people’s code and vice versa ? How come you cannot see other people code or processes ? The first thing you probably be th

Topics: container gvisor host kernel sentry

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Cedana (YC S23) Is Hiring a Systems Engineer

news.ycombinator.com Unknown 2025-12-15 08:00:30

At Cedana, we are solving what many thought was impossible: the seamless, live migration of active CPU+GPU containers across global compute. We're building the next generation of AI orchestration systems, founded on our pioneering work in checkpoint/restore technology. This isn't just an incremental improvement; it's a fundamental shift that makes distributed computing truly portable, elastic, and resilient across planet scale compute. This is an exceptionally difficult systems problem that req

Topics: container distributed kernel kubernetes systems

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How we rooted Copilot

news.ycombinator.com Vaisha Bernard 2025-12-20 11:06:09

Microsoft has silently pushed an update back in April 2025 for Copilot Enterprise, enabling a live Python sandbox running Jupyter Notebook that can execute code in the backend. Well, that sounds like a terrific idea, let’s explore it for a bit! It turns out to be easy to have it execute exactly the code we want to on the underlying system using Jupyter Notebook syntax %command . Well, it worked most of the time. It feels like telling an 8-year-old child to do something. If it’s in a good mood

Topics: bin binary container script ubuntu

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How We Rooted Copilot

news.ycombinator.com Vaisha Bernard 2025-12-20 23:06:09

Microsoft has silently pushed an update back in April 2025 for Copilot Enterprise, enabling a live Python sandbox running Jupyter Notebook that can execute code in the backend. Well, that sounds like a terrific idea, let’s explore it for a bit! It turns out to be easy to have it execute exactly the code we want to on the underlying system using Jupyter Notebook syntax %command . Well, it worked most of the time. It feels like telling an 8-year-old child to do something. If it’s in a good mood

Topics: bin binary container script ubuntu

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Broadcom to discontinue free Bitnami Helm charts

news.ycombinator.com Unknown 2026-01-04 06:29:52

📢 Overview As of August 28th, 2025, the Bitnami public catalog will undergo the following changes: Community catalog Disable images generation for Debian-based images and gradually move existing ones to a Bitnami Legacy repository. A focused set of more hardened, more secure images. These free images are intended for development and are only available on the “latest” tag. You can find them at https://hub.docker.com/u/bitnamisecure. Helm charts and container images' open-source code will contin

Topics: bitnami container images legacy repository

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Ziploc, Rubbermaid Sued Over Microplastics: Should You Ditch Plastic Containers?

cnet.com See Full Bio 2026-01-11 22:21:00

When you buy plastic food containers, you tend to look for whether they're microwave and freezer-safe. The maker of Rubbermaid, Newell Brands, is now facing a class action lawsuit for claiming that its plastic-based containers are "microwave safe" and "freezer-safe." According to the complaint, these products can release microplastics into food even when used as per the instructions, despite the products' marketing claiming otherwise. Ziploc is also facing a similar class action lawsuit. Ziploc

Topics: containers food microplastics plastic safe

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Incus – Next-generation system container, application container, and VM manager

news.ycombinator.com Unknown 2026-01-16 14:36:30

What is Incus?¶ Incus is a next-generation system container, application container, and virtual machine manager. It provides a user experience similar to that of a public cloud. With it, you can easily mix and match both containers and virtual machines, sharing the same underlying storage and network. Incus is image based and provides images for a wide number of Linux distributions. It provides flexibility and scalability for various use cases, with support for different storage backends and

Topics: containers incus releases running virtual

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What is Incus?

news.ycombinator.com Unknown 2026-01-16 20:36:30

What is Incus?¶ Incus is a next-generation system container, application container, and virtual machine manager. It provides a user experience similar to that of a public cloud. With it, you can easily mix and match both containers and virtual machines, sharing the same underlying storage and network. Incus is image based and provides images for a wide number of Linux distributions. It provides flexibility and scalability for various use cases, with support for different storage backends and

Topics: containers incus releases running virtual

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Don't Put Your Takeout Containers in the Microwave. Here's Why

cnet.com See Full Bio 2026-01-20 11:00:00

When hunger and laziness coincide, reheating last night's leftovers in the microwave seems like a great idea. But if you reheat them in the plastic container they came in, you could be ingesting microplastics and harmful chemicals. But is plastic contamination as dangerous as experts say? All signs point to yes. Study after study has shown that the resulting chemical exposure of microplastics could pose significant health risks, and has been linked to increases in medical issues like infertilit

Topics: containers food microwave plastic safe

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Building untrusted container images safely at scale

news.ycombinator.com Unknown 2026-02-09 14:22:05

Many SaaS platforms need to run customer code securely and fast. Rather than building container infrastructure from scratch, you can use Depot's API to handle the heavy lifting. Here's how to build Go tooling that creates isolated projects, manages builds, and tracks metrics for your customer workloads. A lot of our customers run into the same problem: they need to run code on behalf of their customers. Whether you're hosting user-generated Python scripts, processing custom containers, or runni

Topics: api build container depot project

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Apptainer: Application Containers for Linux

news.ycombinator.com Unknown 2026-02-18 21:45:21

Bring your existing Docker images. Apptainer can import any container from OCI (Open Containers Initiative) registries. It aims for maximum compatibility with Docker, allowing you to pull, run, and build from most containers on Docker Hub without changes. This makes it easy to work with Docker containers while benefitting from Apptainer's secure, portable, and easy-to-use container system.

Topics: apptainer container containers docker easy

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Latest Tech News

How Container Filesystem Works: Building a Docker-Like Container from Scratch

Show HN: Pooshit – Sync local code to remote Docker containers

Show HN: Pooshit – sync local code to remote Docker containers

Will AI be the basis of many future industrial fortunes, or a net loser?

AI Will Not Make You Rich

Hackers hide behind Tor in exposed Docker API breaches

I ditched Docker for Podman

I Ditched Docker for Podman (and You Should Too)

Takeout Containers Should Never Go in the Microwave. This Is Why

About Containers and VMs

Critical Docker Desktop flaw lets attackers hijack Windows hosts

Even More Shrimp Just Got Recalled Because of Radiation, at More Grocery Stores

How Did Walmart Frozen Shrimp Become Contaminated With Radioactive Material?

Docker container for running Claude Code in "dangerously skip permissions" mode

Comparison of different C libraries providing generic containers capabilities

Show HN: Trayce – Burp Suite for developers

I want everything local – Building my offline AI workspace

Show HN: Trayce – “Burp Suite for developers”

Kali Linux can now run in Apple containers on macOS systems

What is gVisor?

Cedana (YC S23) Is Hiring a Systems Engineer

How we rooted Copilot

How We Rooted Copilot

Broadcom to discontinue free Bitnami Helm charts

Ziploc, Rubbermaid Sued Over Microplastics: Should You Ditch Plastic Containers?

Incus – Next-generation system container, application container, and VM manager

What is Incus?

Don't Put Your Takeout Containers in the Microwave. Here's Why

Building untrusted container images safely at scale

Apptainer: Application Containers for Linux

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