The hottest Operating Systems Substack posts right now

And their main takeaways
Category
Top Technology Topics

NeXTWorld Interviews Bud Tribble, One of the NeXT Founders (1994)

Computer Ads from the Past • 1024 implied HN points • 01 Feb 26
🕹 Technology Operating Systems
  1. Sun picked NeXT’s OpenStep because it was a shipping, customer-tested object application environment that fit their distributed-object vision and gave a clear time-to-market advantage over building something new or waiting for competitors.
  2. OpenStep is being promoted as an industry standard through bodies like OMG and X/Open, but standardization will be gradual and will require proven implementations; it’s designed to work across languages and CORBA/IDL boundaries for interoperability.
  3. OpenStep will coexist with procedural environments and Windows compatibility on the same desktop, aiming for smooth interoperability (shared imaging, cut/copy/paste, and even a common Dock concept), while NeXT and Sun collaborate on ports and future evolution alongside licensing and platform sales.

NCR Tower 1632

Computer Ads from the Past • 896 implied HN points • 01 Feb 26
🕹 Technology Operating Systems
  1. The Tower 1632 was a compact, under-desk microcomputer built around the Motorola 68000 that ran an enhanced UNIX, supported up to 16 users, had 256KB–2MB of memory and expandable disk storage up to about 1GB, and was sold to OEMs for roughly $12,000.
  2. NCR shifted its organization to push decision-making down to plant and product managers and act more entrepreneurial, enabling faster development and release of systems like the Tower 1632.
  3. Hardware and software features like Multibus I/O, power-fail memory recovery, IP protection, and multiple communications options looked strong on paper, but users reported unreliable or outdated OS releases, slow or failing disks, weak driver support, and difficult file transfers that limited real-world use.

Vote for the January 2026 + Post Topic

Computer Ads from the Past • 384 implied HN points • 23 Jan 26
🕹 Technology Operating Systems
  1. A poll is open for plus subscribers to choose the January 2026 post topic, so readers can vote on what gets written next.
  2. The three candidate topics focus on vintage computing: a mouse, a CP/M helper program, and a flight simulator.
  3. Each option is shown with scans from old magazines, and more related articles are planned to follow soon.

From Azure Functions to FreeBSD

Blog System/5 • 661 implied HN points • 07 Dec 25
🕹 Technology Operating Systems
  1. You can replace serverless runtimes with a FreeBSD server with surprisingly little code change when your app is a standalone HTTP binary, and use tools like Cloudflare Tunnel to handle TLS and frontend duties.
  2. FreeBSD's built-in utilities (daemon(8), rc.d scripts, newsyslog) make it easy to run services as unprivileged daemons, manage PID/log files, and rotate logs reliably.
  3. Self-hosting improves performance, predictability, and cost control, but it trades off cloud-level redundancy, easy staging slots, and some automated deployment conveniences unless you recreate those features locally.

Poor Person Software's Write-Hand Man

Computer Ads from the Past • 512 implied HN points • 01 Dec 25
🕹 Technology Operating Systems
  1. Write-Hand Man brought Sidekick-style pop-up utilities to CP/M, letting users call up a notepad, phonebook, calendar, calculator, file viewer and a communications tool without leaving their main program.
  2. It used memory-saving and swap-to-disk tricks so it could run in 64K CP/M systems, but that made it slow on floppy drives and could conflict with some modem programs unless you had a RAM disk or hard drive.
  3. Poor Person Software was an obscure small company that sold the utility at a modest price and had its product enhanced by Technical Micro Systems to add H/Z19 graphics and extra features.
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Unix Review Interviews Ted Dolotta and Heinz Lycklama from Interactive Systems Corporation (1984)

Computer Ads from the Past • 256 implied HN points • 28 Nov 25
🕹 Technology Operating Systems
  1. PC/IX is a faithful port of AT&T’s System III Unix to the IBM PC‑XT that keeps the System III system calls while adding PC‑friendly tools (like the INed editor and Connect) and performance tweaks such as contiguous file loading and optional 8087 floating‑point support.
  2. Because the 8088 lacks memory protection, PC/IX is sold as a single concurrent‑user, multitasking system that needs a 10 MB hard disk and ships on 19 floppies; IBM will support the product while ISC provides polished documentation and a device‑driver guide to enable extensions.
  3. ISC expects a fast growth of third‑party and ISC applications (languages like COBOL and FORTRAN, INmail/INnet/FTP, word processing and databases) and believes IBM’s marketing and support will help drive adoption and encourage vendors to port their software to PC/IX.

What is a Crash?

Jacob’s Tech Tavern • 3498 implied HN points • 04 Nov 24
🕹 Technology Operating Systems
  1. A crash happens when an app unexpectedly stops, but it can actually be a safety measure to prevent bigger problems. Think of it like a controlled explosion that protects your device.
  2. There are two main types of crashes: those caused by the Swift Runtime and those from the XNU Kernel. Each has its own reasons for triggering a crash to protect the system.
  3. Crashes don't just cause inconvenience; they are there to protect users from worse issues, like losing data or compromising security. They help keep everything safe even when things go wrong.

Revisiting the NetBSD build system

Blog System/5 • 2150 implied HN points • 28 Dec 24
🕹 Technology Operating Systems
  1. NetBSD's build system is powerful and flexible, allowing users to build the operating system from scratch on any supported hardware without needing root access. This makes it useful for developers and advanced users.
  2. The build process is user-friendly due to the `build.sh` script, which simplifies complex commands into easy-to-understand goals. You can easily compile and create disk images with just a few commands.
  3. While the build system has many strengths, it also has inefficiencies, especially with incremental builds. Improvements could make it faster and less resource-intensive, which is a consideration for future development.

[214.] Hello. Happy Anniversary Macintosh!

Hardcore Software • 694 implied HN points • 24 Jan 24
🕹 Technology Operating Systems
  1. The introduction of the Apple Macintosh in 1984 profoundly changed computing and many people's lives
  2. The Macintosh brought empowerment, elegance, and a sense of mastery to users and developers, setting a new standard in the industry
  3. The Macintosh's impact was widespread, transforming document creation, software development, and user experiences on college campuses and beyond

Beyond Snowflake: A Problem-Solver’s Guide to Distributed ID Generation

Software Bits Newsletter • 51 implied HN points • 04 Jan 26
🕹 Technology Operating Systems
  1. Memory allocator patterns — like per-node caches, hierarchical range grants, batching, and prefetching — transfer cleanly to distributed ID generation and let services hand out unique IDs locally with almost no coordination.
  2. There is no one-size-fits-all ID strategy: slabs and hierarchical ranges give extreme throughput and B-tree locality at the cost of wasted IDs and weaker global ordering, consensus gives strict global ordering and durability but costs latency and availability, and Snowflake-style schemes sit in between.
  3. The best engineering move is methodological: spot a related solved problem, extract its core principles (hierarchy, locality, batching, prefetching), and adapt them while accounting for distributed realities like partial failure and unbounded latency.

Learning the Command Line

Data Engineering Central • 511 implied HN points • 08 Jan 24
🕹 Technology Operating Systems
  1. Learning the command line is still important in the age of cloud computing because it enables faster development and automation.
  2. The command line tools and commands are similar across different operating systems, so focusing on general concepts is more important than specific system knowledge.
  3. Using the command line allows you to work with popular tools like Docker, Kubernetes, and AWS efficiently, making it crucial for engineers in high-performance teams.

Linux Context Switching Internals: Part 1 - Process State and Memory

Confessions of a Code Addict • 1106 implied HN points • 29 Dec 24
🕹 Technology Operating Systems
  1. Context switching allows a computer to run multiple tasks by efficiently switching between different processes. It's important to understand it because it affects a system's performance.
  2. The Linux kernel uses specific structures, like 'task_struct' and 'mm_struct', to manage process states and memory. These structures help keep track of what each process is doing and how it uses memory.
  3. When a process runs out of CPU time or needs to wait, the kernel uses flags to decide when to switch to another process. This ensures that all processes get a chance to run, even if some are waiting for resources.

The very first interview about Linux with Linus Torvalds - Oct 28, 1992

The Lunduke Journal of Technology • 5170 implied HN points • 16 Apr 23
🕹 Technology Operating Systems
  1. The first interview about Linux with Linus Torvalds was published in a small E-Mail newsletter in 1992.
  2. The newsletter was significant as it was the first written specifically for Linux and contained the first interview ever with Linus Torvalds about Linux.
  3. Linus Torvalds started working on Linux after taking a UNIX and C course at university, and the system evolved from a terminal emulator to a UNIX-like system.

8-Bit : Learning from the Sources

The Chip Letter • 2839 implied HN points • 19 Dec 23
🕹 Technology Operating Systems
  1. You can learn about computer hardware by studying assembly language of 8-bit systems.
  2. Studying 8-bit architectures is easier to grasp than modern instruction set architectures.
  3. Hacking on 8-bit systems can be a fun and instructive way to understand the basics of microprocessors.

My Top 15 OS Books: From Theory and Implementation to Systems Programming

Confessions of a Code Addict • 673 implied HN points • 18 Feb 25
🕹 Technology Operating Systems
  1. Understanding operating systems is really important for software engineers. It helps you know how your code runs and can make fixing problems easier.
  2. There are different types of books to learn about operating systems: theory books, implementation books, and systems programming books. Each type helps you at different stages of your programming journey.
  3. Some popular OS books, like 'Operating Systems: Three Easy Pieces', are easy to understand and cover key concepts without sticking to just one system. These resources are great for anyone wanting to learn about OS.

Synology DS923+ vs. FreeBSD w/ZFS

Blog System/5 • 827 implied HN points • 13 Dec 24
🕹 Technology Operating Systems
  1. Synology DS923+ and FreeBSD with ZFS offer different approaches for storage solutions. The DS923+ is a dedicated device designed for ease of use, while FreeBSD requires more manual setup and maintenance.
  2. The Synology system provides a friendly user interface and features like cloud backup options, while FreeBSD offers powerful command-line control but can be less user-friendly.
  3. Using the Synology NAS can give more peace of mind regarding data health and security due to its built-in features like encryption and monitoring alerts, compared to a DIY FreeBSD setup.

Context Switching and Performance: What Every Developer Should Know

Confessions of a Code Addict • 721 implied HN points • 12 Dec 24
🕹 Technology Operating Systems
  1. Context switching happens when a computer's operating system manages multiple tasks. It's necessary for keeping the system responsive, but it can slow things down a lot.
  2. Understanding what happens during context switching helps developers find ways to reduce its impact on performance. This includes knowing about CPU registers and how processes interact with the system.
  3. There are specific vulnerabilities and costs associated with context switching that can affect a system's efficiency. Being aware of these can help in optimizing performance.

Issue #116

Infra Weekly Newsletter • 4 implied HN points • 26 Feb 26
🕹 Technology Operating Systems
  1. Openclaw is a must-see demo that hints at a revolutionary capability, but it also raises serious security and safety concerns that need urgent attention.
  2. Trying to build services "Made in EU" is harder than it sounds because app distribution and common logins still tie you to US platforms, but there are many affordable EU hosters, auth and mail providers and de-Googled options like Sailfish OS that help keep data in Europe and support technical sovereignty.
  3. NixOS offers strong reproducibility, atomic updates and rollbacks for infrastructure, so creating Kubernetes inside VMs with imperative tools like kubeadm can undercut that declarative approach; using Nix to manage clusters is educational but the tooling choices matter for true reproducibility.

Disillusioning the Magic of the fork System Call

Confessions of a Code Addict • 649 implied HN points • 26 Nov 24
🕹 Technology Operating Systems
  1. The fork system call creates a new process that is a copy of the parent process, but each can follow a different path after the call. This is why a program can behave differently depending on which process it is in.
  2. When the fork call is made, the operating system needs to return distinct values to both the parent and child processes. The kernel sets the return value for the child process to 0, while the parent gets the child’s process ID.
  3. System calls are handled in the kernel, which means understanding their low-level operations helps us see how programming languages like C manage processes, revealing the complexity hidden behind simple function calls.

The real "Year of The Linux Desktop"...

The Lunduke Journal of Technology • 574 implied HN points • 18 Dec 24
🕹 Technology Operating Systems
  1. The Linux desktop is becoming more popular and user-friendly. More people are starting to see it as a viable alternative to other operating systems.
  2. New software and updates are making Linux easier for everyone to use. People don’t need to be experts anymore to enjoy its benefits.
  3. Community support and resources for Linux are growing. This means users can get help and share ideas more easily.

Hardware discovery: ACPI & Device Tree

Blog System/5 • 330 implied HN points • 01 Mar 25
🕹 Technology Operating Systems
  1. Hardware discovery is the process where a computer's operating system recognizes the devices connected to it, like printers or keyboards, and finds the right drivers to make them work.
  2. ACPI and Device Tree are two methods that help the operating system understand what hardware is present; ACPI is used mainly on PCs, while Device Tree is often used for embedded devices like Raspberry Pi.
  3. For the system to function properly, it's important to load the correct configuration for these hardware descriptions at boot time, which helps the kernel know how to interact with the hardware.

Links: February 2024 edition

Blog System/5 • 496 implied HN points • 29 Feb 24
🕹 Technology Operating Systems
  1. The post summarizes interesting articles, videos, and projects from February 2024 with added commentary to urge readers to explore the content.
  2. There are discussions on topics like old hardware databases, software development reflections, and the challenges of modern software bloat.
  3. The author explores topics like breaking memory limitations in DOS, DJGPP running GNU programs on DOS, and the creation of a library in Rust for implementing memory vulnerabilities.

VenturCom's VENIX

Computer Ads from the Past • 384 implied HN points • 19 Feb 24
🕹 Technology Operating Systems
  1. VenturCom was founded in 1980 and worked on various projects including Venix, Windows NT, and Windows CE. They later changed their name to Ardence, which was acquired by Citrix Systems before becoming IntervalZero.
  2. Venix was one of the first UNIX systems for IBM PCs, based on Version 7 Unix with enhancements. It had different versions released over the years and received feedback on pricing, performance, and features compared to other similar systems like Xenix.
  3. Reviews from publications like PC Magazine and Dr. Dobb's Journal praised Venix's compatibility with System V Unix, while also highlighting areas for improvement like bugs, DOS interface, and third-party software support.

Using Kali Linux and Hydra for Attack Testing and Alert Generation

Rod’s Blog • 59 implied HN points • 15 Sep 23
🕹 Technology Operating Systems
  1. Hydra is a powerful open-source tool used for cracking passwords in various network services like telnet, FTP, HTTP, etc.
  2. Kali Linux is a specialized operating system designed for penetration testing and comes pre-installed with tools like Hydra.
  3. It is crucial to use tools like Hydra ethically and with proper authorization to perform effective security assessments and improve system security.

A brief history of my experience with Linux

Arraybolt's Archives • 58 implied HN points • 09 Mar 23
🕹 Technology Operating Systems
  1. The author's journey with Linux started from a young age on Windows, then moved to testing different Linux distros like KXStudio and ChaletOS.
  2. Experimenting with different distros in virtual machines and on physical hardware led to the discovery and preference for Ubuntu-based distros like Kubuntu and Lubuntu.
  3. Eventually, the author transitioned to contributing to Ubuntu development, experiencing the joy of being part of a community and making a positive impact.

Computer self-help

My Home Office Hacks • 5 implied HN points • 15 Dec 25
🕹 Technology Operating Systems
  1. Try fixing problems yourself by searching online before calling IT or going to a store; many issues have simple step‑by‑step solutions.
  2. Use built‑in command‑line tools like sfc /scannow and DISM (e.g., DISM.exe /Online /Cleanup-image /Restorehealth) to repair system issues, and run Command Prompt as administrator then reboot.
  3. Learning to follow instructions and try fixes on your own saves time, reduces downtime, and builds confidence working from home.

All the bullshit I did as a kid (part 1?)

Basta’s Notes • 204 implied HN points • 17 Jan 24
🕹 Technology Operating Systems
  1. The author reflects on the interesting and ambitious projects they worked on as a kid, showcasing a strong interest in technology and programming.
  2. Despite lacking mentorship, the author taught themselves valuable programming skills, such as building their own web browser and writing complex code like a CSS parser.
  3. The journey from tinkering with personal computers to winning a programming contest and earning internship opportunities highlights the author's growth and passion for technology.

What is an AI OS?

12challenges • 171 implied HN points • 18 Mar 24
🕹 Technology Operating Systems
  1. An AI OS is an operating system that uses AI to manage hardware and software on a computer.
  2. Without an OS, devices like laptops, phones, and smartwatches cannot communicate between each other.
  3. AI OSes can range from weak to strong depending on the level of permissions given to AI for managing hardware and software.

Switching to a dumb phone (sort of)

Rahul’s Newsletter • 39 implied HN points • 16 Oct 23
🕹 Technology Operating Systems
  1. Experimenting with using a basic phone instead of a smartphone to reduce screen time and regain focus.
  2. Comparison of features and trade-offs between an iPhone and a basic Nokia phone for different user needs.
  3. Challenges and benefits of transitioning to a basic phone, like missing out on certain apps but gaining better focus and less distraction.

Why Android Owners Switch to iPhone

CIRP - Apple Report • 39 implied HN points • 31 May 23
🕹 Technology Operating Systems
  1. Android owners switch to iPhone for reasons like better features and user experience.
  2. Some Android owners switch to iPhone due to specific problems with their previous Android phone.
  3. Cost and the desire to use iMessage and FaceTime with family and friends are also reasons for Android owners to switch to iPhone.

The ideal operating system

Fulton’s ramblings • 19 implied HN points • 13 Jul 23
🕹 Technology Operating Systems
  1. Consider using LISP machines as a potential alternative to modern UNIX systems.
  2. Eliminate the concept of local files and shift towards a global, decentralized storage system like IPFS.
  3. Develop a Notebook User Interface that integrates collaborative notebooks, applications, and websites into a seamless OS experience.

Chuyện bây giờ mới kể: Made in Vietnam

Thái | Hacker | Kỹ sư tin tặc • 179 implied HN points • 27 Jun 19
🕹 Technology Operating Systems
  1. The open source culture in technology allows people to share and use creative accomplishments, contributing to the backbone of the Internet.
  2. Vietnam has programmers involved in important open-source projects, providing a valuable way to learn, share, connect, and introduce themselves to the world.
  3. Despite the popularity of Linux worldwide, schools, companies, and government agencies in Vietnam still predominantly use Windows, showing a one-way flow of technology from the world into Vietnam.

Lets compile Linux DOOM

Deus In Machina • 36 implied HN points • 01 Feb 24
🕹 Technology Operating Systems
  1. Compiling the Linux DOOM source code requires setting up the source code from the id-software repository and navigating through different build methods like Make and CMake.
  2. Encountering and solving errors in the compilation process involves making adjustments to data types, structure pointers, and handling variables like errno to ensure successful building of the DOOM executable.
  3. To address color depth issues and display errors while running the DOOM game on modern systems, utilizing tools like Xephyr, setting specific environmental variables, and modifying code sections related to color maps and display resolutions becomes critical.