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This project is a technical reference and educational guide focused on the internal architecture of the Linux kernel. It serves as a low-level systems programming resource and documentation for operating system internals, detailing the implementation of core mechanisms within the kernel source code. The materials provide a detailed study of the Linux kernel, tracing behavior through actual C source and assembly. It specifically covers the progression from the bootloader and decompression to the final kernel entry point, alongside the management of hardware interrupts and symmetric multiproces

This project is a bare-metal operating system developed for ARM64 architecture. It serves as a low-level implementation of kernel engineering, focusing on the fundamental construction of an OS from the hardware level up. The system is distinguished by its comprehensive approach to ARM64 processor control, featuring a red-black tree task scheduler and a hierarchical page table system for virtual memory management. It implements a sophisticated privilege model that handles transitions between kernel and user modes, ensuring process isolation through address space splitting and exception level m

xv6 is a Unix-like educational operating system designed for teaching kernel concepts. It is implemented as an instructional kernel for x86 and RISC-V architectures, featuring a virtual memory manager and support for symmetric multiprocessing. The system is designed to demonstrate core OS principles through a simplified re-implementation of Unix Version 6. It provides a controlled environment for studying system calls, trap handling, and process lifecycles. Its capability surface covers process management, including scheduling and context switching, and memory management via page tables for

Webmin is a web-based administration interface for Unix systems. It provides a centralized console for managing the full range of server administration tasks — users and groups, software packages, storage, network configuration, system services, and security — all through a browser. Its modular architecture allows separate modules to handle databases (MySQL, MariaDB, PostgreSQL), web servers (Apache), DNS (BIND), email (Sendmail, Dovecot), file sharing (Samba, NFS), and more, with a unified access control system that restricts what each administrator can see and do. What sets Webmin apart is

Asterinas هو نواة نظام تشغيل آمنة للذاكرة مصممة لمنع سباقات البيانات وتلف الذاكرة. تعمل كنواة متوافقة مع Linux-ABI، مما يتيح تنفيذ ملفات Linux الثنائية الحالية وأحمال عمل الحاويات مع توفير نموذج توزيع نظام تشغيل تصريحي. يتميز المشروع بكونه مضيف حاويات آلة افتراضية ونظام تشغيل ضيف للحوسبة السرية، مما يسمح له بالعمل داخل بيئات تنفيذ موثوقة معزولة بالأجهزة مثل Intel TDX. ينفذ قاعدة حوسبة موثوقة دنيا عن طريق عزل العمليات غير الآمنة منخفضة المستوى ويفصل آليات النواة الأساسية عن تنفيذات السياسات المحددة. يغطي النظام مجموعة واسعة من القدرات، بما في ذلك إدارة الذاكرة الفيزيائية والافتراضية، والمعالجة المتعددة المتماثلة، وتجريد الأجهزة لمختلف معماريات CPU. كما يتضمن دعمًا لأوقات تشغيل الحاويات الآمنة، ومجموعة شاملة من بدائيات الشبكات والمقابس (sockets)، وسلسلة أدوات متخصصة لتجميع النواة والمحاكاة. يدعم المشروع النشر متعدد المعماريات عبر منصات x86-64 و RISC-V 64 و LoongArch 64.

nix is a Unix system API library and Rust system programming interface that provides type-safe bindings for invoking low-level system calls. It serves as a low-level operating system wrapper and POSIX compatibility layer, allowing for kernel interactions and administrative tasks through safe wrappers around platform-specific APIs. The project provides a kernel device interface for controlling hardware devices, managing kernel modules, and configuring terminal interfaces. It differentiates itself by offering type-safe wrappers for memory mapping and zero-copy input-output operations to reduce

Exegol is an offensive security platform and containerized tooling orchestrator designed to deploy and manage isolated security operations environments. It functions as a workspace manager that provisions pre-configured security images and toolkits within Docker containers to protect host systems from malicious payloads. The platform distinguishes itself by integrating AI security workflow orchestration, allowing AI assistants to discover and trigger security tools through a standardized communication protocol. It further provides remote desktop gateway capabilities, enabling GUI access via X