Microsoft confirms that the Win32 API, introduced in the 1990s, remains the core of Windows 11, highlighting how deep compatibility requirements and a massive legacy app ecosystem keep the old code alive despite modern UI frameworks and Chromium‑based components.
The article compares Debian and Ubuntu, showing how Debian’s community‑driven purity, stable release model, broad hardware support, flexible desktop choices, classic APT packaging, and strong community make it a superior daily‑driver Linux distribution.
The article explains that the shift from BIOS to UEFI, combined with Windows 7’s lack of UEFI support, driver gaps, and security shortcomings, makes installing Windows 7 on current hardware extremely difficult despite patch workarounds.
This article examines whether Linux, specifically the Deepin distribution, can serve as a practical replacement for Windows by showcasing its graphical desktop, daily development environment, communication apps, Android compatibility, performance advantages, command‑line efficiency, and the freedom offered by an open‑source operating system.
This comprehensive guide explores the Linux kernel’s architecture, core subsystems, source‑tree layout, and dynamic module management while offering practical learning paths, essential command‑line tools, code examples, and curated reading material for anyone aiming to master operating‑system internals.
This article breaks down the fundamentals of process context switching, explaining CPU registers, program counters, the three-step switch routine, trigger conditions, performance impact, monitoring tools, and practical optimization techniques to help interview candidates answer confidently.
This article examines whether Linux can serve as a practical daily‑use operating system, covering its graphical interface, development tool support, communication apps, Windows‑replacement capabilities, Android app execution via xDroid, and the core advantages of elegance, efficiency, and freedom, illustrated with screenshots and personal software lists.
The article examines Linux from the perspective of everyday users versus developers, outlining why programmers favor it, the challenges newcomers face, the long‑term career advantages, and when choosing Linux makes sense despite its steep learning curve.
Linux kernel 7.0, released on the 12th of this month, brings a range of updates including Rust integration, post‑quantum ML‑DSA signatures, enhanced BPF‑based io_uring filtering, a new immutable NULLFS, storage and memory management upgrades, and numerous networking and virtualization enhancements, while clarifying that the version number itself does not mark a major turning point.
This article explains the definitions, internal structures, lifecycle, scheduling, communication mechanisms, and trade‑offs of processes, threads, and coroutines, helping readers master a frequent interview topic and choose the right concurrency model for their applications.
The article compiles several Zhihu contributors' explanations—covering historical Windows dominance, IIS limitations, cost differences, ecosystem strength, container support, and open‑source politics—to show why Linux has become the default operating system for modern servers.
This article explains how the Memory Management Unit (MMU) underpins Linux's virtual memory, process isolation, and protection mechanisms, detailing its architecture, address‑translation workflow, TLB caching, practical C implementations, real‑world use cases, and debugging techniques for kernel developers.
This article explains the core philosophy of Linux’s “everything is a file” design, walks through the kernel’s VFS layer, inode, dentry, superblock, logical blocks, and specific file systems, and provides hands‑on examples—including procfs initialization and read/write code—to help readers master Linux kernel file system internals.
The article analyzes why ordinary users stick with Windows or macOS while technical professionals increasingly adopt Linux, highlighting differences in system openness, efficiency, ecosystem support, and how these factors drive a purposeful technical choice rather than mere trend following.
This article explains Linux’s comprehensive memory management system, covering physical and virtual memory concepts, paging, page tables, the MMU, the buddy allocator, slab allocator, memory reclamation strategies such as LRU and swap, monitoring tools, and practical optimization techniques for both user‑space and kernel‑space allocations.
This comprehensive guide explores the Linux kernel file system architecture, covering fundamental concepts such as inodes, dentries, superblocks, logical blocks, the VFS layer, common on‑disk filesystems, mounting procedures, and a deep dive into the proc virtual filesystem with code examples and practical usage tips.
This article compiles a comprehensive set of technical interview questions and concise answers covering Linux kernel‑user communication, interrupt handling, memory allocation strategies, macros, endianness, cache hierarchy, process context, DMA, virtual memory translation, debugging tools, and driver initialization, aimed at candidates preparing for embedded Linux driver roles.
This guide walks readers through the fundamentals of the Linux kernel, explaining its core subsystems, source tree layout, process management, memory handling, file systems, networking, device drivers, debugging tools, and practical learning resources, while providing code examples and command‑line utilities for hands‑on exploration.
This article explains the fundamentals of CPU context switching, covering the hardware and kernel mechanisms, step‑by‑step saving and restoring of registers, scheduling algorithms, different types of switches, performance costs, optimization techniques, and includes a complete C++ simulation example.
FreeBSD 15.0 has been officially released, bringing root‑less reproducible builds, updated OpenZFS, newer OpenSSL/OpenSSH, native inotify support, extensive driver upgrades—including Intel E800, Tiger Lake to Meteor Lake, BNXT 400G, and Wi‑Fi 6—while deprecating AGP and adding pkg management.
The article explains that operating systems act as resource allocators, isolators, and abstraction layers, enabling multiple programs to share limited CPU, memory, and disk resources safely and efficiently through scheduling, memory partitioning, and hiding hardware complexities.
System calls differ from regular function calls by using the CPU’s privileged syscall instruction, indirect indexing via registers, and a mode switch from user to kernel space, allowing the OS to control which kernel functions applications can invoke, while ordinary calls use direct addresses and stay in user mode.
This article demystifies the Linux kernel by explaining its core subsystems—process scheduling, memory management, virtual file system, networking, and device drivers—while offering practical learning paths, essential commands, code examples, and curated resources for anyone wanting to master Linux internals.
This article outlines Microsoft’s Windows 10, Windows 11, and Windows Server lifecycle policies, release schedules, and the exact ISO build numbers for each major version, helping users navigate support timelines and download the correct installation media.
Linux memory management relies on virtual address spaces that map to physical RAM, using page tables, multi-level paging, and dynamic allocation across segments like stack, heap, and mmap, while tools such as free, top, and ps let administrators monitor usage and handle OOM scenarios.
This guide explains the official release of Windows 11 build 26200.6584, details the various editions (Consumer, Business, Home Chinese, Professional Chinese), provides download tips such as selecting x64 versus ARM64, interpreting language codes, understanding image types and IoT variants, and lists two download methods with URLs.
The article introduces the multikernel operating‑system paradigm, explains how traditional monolithic and microkernel designs struggle with scalability, noisy‑neighbor interference, and one‑size‑fits‑all kernels, and details the multikernel’s performance, isolation, customization, zero‑downtime updates, elastic resource management, and security benefits for cloud and real‑time workloads.
OpenHarmony 6.0, unveiled at the 2025 OpenAtom OpenHarmony conference in Changsha, introduces major upgrades across UI components, ArkTS language, media handling, graphics, security protocols, and performance testing, while reporting over 17 million HarmonyOS devices and a rapidly growing contributor community.
Google announced it will retain both Android and ChromeOS while rebuilding ChromeOS on the Android stack, aiming to launch Android‑based PCs by 2026 that combine ChromeOS‑like experience with full Android app compatibility, leveraging Qualcomm’s new Snapdragon processors for seamless cross‑device integration.
This article explains Linux’s Copy‑On‑Write mechanism, detailing how it avoids full memory duplication during process creation, the underlying page‑table workflow, its implementation in the kernel, and real‑world applications such as Redis persistence, Docker image layering, and filesystem snapshots, while also discussing its advantages and drawbacks.
This article explains Linux page faults, describing how the kernel intercepts invalid or unmapped memory accesses, the step‑by‑step handling process, the four typical fault scenarios, and optimization techniques, while providing code examples and diagrams to illustrate virtual‑memory management in depth.
The article introduces the multikernel OS paradigm, explains why traditional monolithic and microkernel designs struggle with scalability, noisy‑neighbor interference, and one‑size‑fits‑all kernels, and details how dedicated kernel instances per core group can deliver near‑bare‑metal performance, strong isolation, zero‑downtime updates, elastic resource management, and AI‑driven customization for cloud and real‑time workloads.
In an interview, Vivo’s BlueOS team explains why they built their operating system with Rust, detailing the language’s safety and performance benefits, the challenges of adoption, the measurable gains in reliability and maintenance, and the learning curve developers faced.
This article breaks down the Linux boot sequence into ten clear stages—from power‑on self‑test and BIOS initialization to loading the kernel, executing init scripts, and finally presenting the login prompt—providing interview‑ready knowledge and detailed explanations for each step.
This guide outlines a step‑by‑step roadmap for aspiring kernel developers, covering essential knowledge foundations, hands‑on teaching‑OS projects, deep‑dive strategies for reading the real Linux kernel source, and curated book recommendations to build solid OS internals expertise.
Vivo unveiled its BlueOS kernel, the first industry‑wide, fully Rust‑written operating system kernel open‑sourced at the 2025 Open Atom Open‑Source Ecosystem Conference, highlighting its security‑first design, lightweight footprint, cross‑architecture compatibility, and AI‑integrated features aimed at the emerging AGI era.
This article explains why Linux gives each thread its own stack, describes the historical evolution from LinuxThreads to NPTL, and walks through the glibc implementation that allocates, sizes, and releases thread‑stack memory using mmap and related kernel calls.
Attempting to bypass the operating system by directly managing memory, executing privileged CPU instructions, or performing raw hardware I/O from a user‑space application is prohibited; modern OS kernels enforce strict privilege levels, protecting critical data structures and ensuring system stability, and any such attempts are blocked or cause crashes.
The article explains how Linux, the free and open‑source operating system, is gaining market share in gaming, government deployments, and hardware support, highlighting its cost‑free nature, community‑driven development, and growing ecosystem that makes it a mainstream choice by 2025.
Microsoft is redesigning the classic Blue Screen of Death into a minimalist black crash screen for Windows 11, speeding up dump collection to about two seconds, simplifying the displayed information, and raising concerns that users might mistake it for a routine update.
Discover the key features, target users, and advantages of nine popular Linux distributions—including Ubuntu, Linux Mint, Fedora, Debian, Pop!_OS, Arch Linux, MX Linux, openSUSE, and Zorin OS—to help beginners and developers select the most suitable OS for their needs.
In a detailed interview, Tencent Cloud OS chief architect Du Zhen explains how TencentOS Server has evolved over 15 years from an internal platform to a multi‑industry, AI‑optimized operating system, outlining its OS‑for‑AI and AI‑for‑OS strategies, performance‑focused scheduling innovations, SWAP redesign, migration solutions, ecosystem building, and future vision.
This guide provides a comprehensive overview of Linux operating systems, covering installation, filesystem hierarchy, essential command-line tools, user and group management, permission settings, process control, and common software installation methods, offering practical examples and code snippets for each topic.
Modern operating systems prevent user‑level programs from directly managing memory, executing privileged CPU instructions, or accessing hardware I/O, because such actions would break isolation, corrupt kernel data structures, and compromise system security, leading the OS to terminate the offending process.
This article demystifies memory I/O by exploring its hardware foundations, the interaction between CPU and memory controllers, the role of user and kernel spaces, timing parameters, cache hierarchies, and practical optimization strategies for databases, file systems, and server applications.
This article explains the Linux Completely Fair Scheduler (CFS), covering its design goals, core concepts such as virtual runtime, weight, red‑black tree management, load‑balancing mechanisms, scheduling policies, and answers common questions about its operation and kernel code.
This article provides a comprehensive overview of Linux memory management, detailing the roles and mechanisms of the early boot memory allocator, the memblock subsystem, the buddy allocator for physical pages, and the slab allocator for small objects, including their data structures, algorithms, and practical usage scenarios.
This article explains the Linux Page Cache mechanism, covering its core concepts, read/write workflows, data consistency, optimization strategies, real-world use cases, advanced topics, common misconceptions, and practical tips for improving system performance and resource management.
In the 1950s programmers wrote directly to hardware, but the fragility of hard‑coded memory and I/O led to the invention of a privileged “expert” kernel mode and a restricted “novice” user mode, with a special instruction to switch, forming the basis of modern system calls and operating system protection.
FreeDOS 1.4, the newest fully open‑source DOS‑compatible OS, arrives three years after 1.3 with a faster development pace, new Freecom shell commands, an improved fdisk, the mTCP networking suite, updated installation media, and detailed notes on components, memory requirements, and virtual‑machine usage.
This tutorial walks you through the complete process of installing the Kylin V10 SP3 Linux operating system, covering media preparation, language selection, disk and software choices, network configuration, root password setup, installation start, reboot, and first login.
The article explains how Linux triggers a page fault when a process accesses a virtual memory page that is not resident in physical RAM, describes the underlying virtual memory and MMU concepts, the kernel data structures involved, the detailed fault‑handling flow, different fault types, and their performance impact.
This article provides an extensive overview of core technical interview subjects—including operating‑system signals, process synchronization and data transfer methods, TLS encryption steps, common caching pitfalls and remedies, Java collection implementations, heap‑building algorithms, and various CPU scheduling strategies—offering concise explanations and practical code examples for each concept.
The article traces the founder’s humble beginnings, the technical evolution of the Galaxy Thunder operating system, collaborative breakthroughs, market‑level analysis of OS monopolies, and a product philosophy that balances social responsibility with commercial viability, outlining concrete strategies for hardware compatibility, performance optimization, and future industry impact.
In celebration of Microsoft's 50th anniversary, this article reveals ten little‑known historical tidbits about Windows—from its original name "Interface Manager" to the early product‑key system, the transition from MS‑DOS, the origins of the "My Documents" folder, and the surprising memory requirements of Windows 1.0.
Although many users still favor Windows 7, the shift from BIOS to UEFI firmware—offering faster boot, larger disk support, and secure boot—renders Win 7 incompatible without complex workarounds, explaining its gradual phase‑out in favor of newer OSes like Windows 10.
This article explains how Linux-like operating systems use virtual memory and the MMU to map virtual addresses to physical memory, describes the data structures (vma_struct and mm_struct) used by uCore, details the page‑fault handling flow, classifies fault types, and shows how these mechanisms affect system performance.
This article explains what Linux context switching is, details the information stored in a process control block, distinguishes between process, thread, and interrupt context switches, and shows how to monitor them using vmstat and pidstat commands.
This article explains the core principles of I/O read/write operations, detailing the data preparation and copying stages, the roles of kernel and user buffers, synchronization models, and performance optimizations such as double buffering, circular buffers, zero‑copy, read‑ahead, and delayed write.
Adding more RAM only speeds up a computer when the existing memory is insufficient, because RAM supplies data to the CPU and serves as cache; with ample RAM the CPU remains the bottleneck, so extra memory mainly enables more simultaneous programs rather than increasing raw processing speed.
This article compiles a wide range of Linux C/C++ interview questions covering language fundamentals, data structures, algorithms, operating systems, networking, databases, and general problem‑solving approaches to help candidates assess and improve their technical knowledge.
The article critiques Windows 11’s cumbersome secondary right‑click menu, weak permission controls that render UAC ineffective, rampant adware, and the platform’s poor developer experience, arguing that these design missteps undermine both user satisfaction and system security.
This article explains the two main operating system kernel designs—monolithic kernels that run all code in kernel mode and microkernels that keep only essential services in kernel mode—detailing their structures, advantages, drawbacks, and real‑world examples such as Linux, macOS, Windows NT, and Harmony OS.
This article provides a comprehensive overview of the Linux Filesystem Hierarchy Standard, explaining the purpose of each top‑level directory, the classification of shareable and variable directories, path types, and practical examples to help readers navigate and manage the Linux file system effectively.
The article analyzes why internet cafés overwhelmingly run Windows instead of Linux, highlighting that Windows’s effective cost, custom network‑booted images, and superior game compatibility and stability outweigh Linux’s free‑software advantage in entertainment‑focused environments.
This article provides a comprehensive overview of the Linux process scheduler, explaining why scheduling is needed, how it works, the various scheduling policies such as real‑time and CFS, the mechanisms for priority and load balancing, and the historical evolution of Linux schedulers with code examples.
Xiaohongshu’s cloud‑native team transformed its over‑90% containerized services by introducing resource‑pooled mixed deployment, fine‑grained unified scheduling, and an elastic container pool with global HPA and cluster autoscaling—driving 35% of resources to mixed use, tens of millions of daily core‑hours, and roughly 30% cost savings while preparing for hybrid‑cloud expansion and FinOps.
Many Windows users avoid Linux due to outdated myths, but modern distributions offer intuitive GUIs, easy installation, robust software ecosystems, gaming support, and reliable driver compatibility, proving that Linux is now a friendly, powerful alternative for everyday computing.
The article announces a free programmer book giveaway via a backend command and then introduces Wubuntu, a Windows‑styled Ubuntu distribution that fully replicates Windows UI, runs without TPM or Secure Boot, supports Windows .exe/.msi and Android apps, and provides download links for its free and professional editions.
DBOS, a Database‑Oriented Operating System proposed by Matei Zaharia and Michael Stonebrake, builds the OS atop a distributed, ACID‑compliant database, storing all system and application state in tables, which simplifies scaling, ensures strong consistency, improves debugging, and reduces attack surface for cloud‑native workloads.
The article explains the essence of process switching by comparing it to function calls, demonstrates how manipulating a function's return address can redirect execution to another function, and shows the underlying assembly and security implications of such control‑flow changes.
The article examines the DBOS concept—a database‑oriented operating system that places a distributed, transactional database at the core of OS services, tracing its roots from early database pioneers to modern cloud workloads and highlighting its potential advantages over traditional Linux‑Kubernetes stacks.
Naver, Korea’s internet powerhouse, has launched its own RHEL‑compatible Linux distribution called Navix, offering a decade of free support and targeting developers, enterprises, and HPC users, while also showcasing the company’s massive data‑center capabilities and cloud integration.
The article explains how Linux, especially the Deepin distribution, offers a full graphical desktop, supports everyday development tools, runs Android apps efficiently, and provides numerous advantages such as elegance, efficiency, command‑line power, and freedom, making it a viable alternative to Windows for many users.
This guide walks developers with C and assembly experience through building a simple bare‑metal operating system that runs directly on ARM64 hardware without any existing OS or bootloader, offering a hands‑on introduction to low‑level system concepts for students, embedded engineers, and computer‑system enthusiasts.
This article introduces six obscure yet powerful Linux distributions—Alpine, ArchBang, Bodhi, Tiny Core, Puppy, and SliTaz—detailing their origins, key characteristics, typical use cases, and why they stand out among the thousands of available Linux releases.
This article provides a comprehensive overview of operating systems, explaining their essence as software, detailing core functions such as process and memory management, device and file system handling, security, user interfaces, and describing key characteristics like concurrency, sharing, asynchrony, virtualization, as well as common OS classifications and architectural designs.
This article provides a comprehensive overview of Linux's task_struct, explaining how the kernel represents and manages processes and threads, detailing its internal fields, state handling, scheduling, credentials, memory layout, and special mechanisms such as hung‑task detection.
Released by a consortium of Chinese research institutions, Asterinas (星绽) OS is an open‑source, Rust‑written operating system that introduces a novel framekernel architecture, aiming to deliver industrial‑grade security comparable to micro‑kernels while preserving the performance of traditional macro‑kernels for cloud and data‑center workloads.
This article traces the evolution of Chinese operating systems from the early research era in the 1960s through the first and second waves of domestic Linux distributions, examines government policies and market dynamics, and discusses recent trends such as multi‑architecture support, root community building, and the ongoing debate over true国产 (indigenous) status.
This article explains the Linux inode structure, how common commands like cp, rm, and mv interact with inodes, the differences between hard and soft links, and provides a detailed overview of system and user log files, log levels, and configuring a centralized rsyslog server.
With Windows 10 support ending on October 14 2025, users face a year‑long deadline that will force many to consider security risks, hardware upgrades, or alternative operating systems, while Microsoft’s push for Windows 11 adoption raises questions about market share and e‑waste.
When a computer finishes loading a webpage and the user does nothing, the CPU appears idle, but the operating system runs a special idle process that repeatedly executes the halt instruction, managing power consumption and illustrating core concepts of processes, scheduling, and hardware‑software interaction.
Apple’s macOS 15 Sequoia has become the latest officially certified UNIX® system, joining both Apple Silicon and x86‑64 entries, and the article explains the history of UNIX, POSIX standards, the XNU kernel’s BSD roots, and how these foundations shape modern macOS and iOS development.
The article explains that an executable file contains machine instructions which the operating system parses (e.g., ELF), loads into RAM by allocating distinct memory regions for code, data, heap, stack and any dynamic libraries, then reads the entry‑point address to set the CPU’s instruction pointer and start execution.
Operating systems are foundational software that manage hardware resources, provide core services like process and memory management, device and file handling, security, and user interfaces, while embodying key properties such as concurrency, sharing, asynchrony, and virtualization, and exist in various architectures from monolithic to microkernels.
Xiaomi Vela, an open‑source IoT operating system built on the NuttX kernel, offers high‑performance real‑time capabilities, rich components, unified frameworks, and extensive connectivity, and has been deployed on over 47 million devices, with source code now publicly released under Apache 2.0.
Celebrating Linux’s 33rd birthday, this article traces its humble 1991 beginnings as Linus Torvalds’s “small hobby” to its ubiquitous presence today across desktops, servers, mobile devices, supercomputers, and even the International Space Station, highlighting its profound impact on modern computing.
Microsoft has confirmed that the traditional Windows Control Panel will eventually be retired in favor of the modern Settings app, with many functions already migrated, legacy options like UAC and System Restore still residing there, and the phase‑out possibly beginning with the Windows 11 25H2 update, though the exact timeline remains unclear.
A Japanese PHP developer released an open‑source project that simulates an operating system using PHP, currently only outputs "Hello World!" in an emulator, and the article provides step‑by‑step installation instructions for macOS and Composer usage.
This article explains how Linux creates processes using fork, vfork, clone and pthread_create, reveals the role of the init process, explores clone flags and namespace checks in the kernel, and shows why understanding these fundamentals demystifies container startup.
This article defines Linux distributions, explains how they build on the open‑source kernel, and reviews ten popular distros—Linux Mint, Manjaro, openSUSE Leap, Elementary OS, Ubuntu, Fedora, Zorin OS, Debian, Pop!_OS, and MX Linux—highlighting each one's key features and ideal use cases.
A Japanese PHP developer released an open‑source project that simulates a simple operating system in PHP, currently limited to printing "Hello World!", and provides step‑by‑step instructions for installing the required PHP version and running the demo on macOS.
This article explains what happens inside a computer when you request memory with malloc, covering the role of the standard library, the compilation and linking process, memory layout, heap allocation, fragmentation, and how the operating system expands the heap.
This article explains the principles of virtual memory, the data structures and functions used in uCore to manage page faults, and how the operating system handles demand paging, page swapping, and invalid accesses through detailed code examples and workflow descriptions.
MenuetOS, a fully assembly‑written operating system created by Finnish developer Ville M. Turjanmaa, showcases how a single programmer can build a complete kernel, TCP/IP stack, GUI, and even run classic games, illustrating the Nordic culture of hobbyist OS development and the trade‑offs of assembly‑only design.
This article explains what happens inside a computer when you request memory with malloc, covering the C standard library, compilation, memory layout, heap allocation, fragmentation, and how the operating system expands the heap using system calls.
This article surveys the most popular Linux distributions—including Red Hat Enterprise Linux, Gentoo, Debian, Ubuntu, Linux Mint, Fedora, Kali Linux, CentOS Stream, Arch Linux, and OpenSUSE—highlighting their target audiences, key features, package management, and typical use cases for desktop, server, and security environments.
The article explains that CentOS Linux 8 ceased updates at the end of 2021 and CentOS 7 will reach end‑of‑support on June 30, 2024, describes the shift to CentOS Stream, and outlines several alternative operating systems—including Rocky Linux, Ubuntu, RHEL, and domestic Chinese distributions—providing guidance for enterprises and developers on migration paths.
This article explains how memory allocation works in C, covering the role of malloc, the distinction between code and user data, the compilation and linking process, heap organization, fragmentation, and how the operating system expands the heap when needed.
