{"id":22687917,"url":"https://github.com/mohitmishra786/exploring-os","last_synced_at":"2025-04-13T07:46:46.601Z","repository":{"id":264329090,"uuid":"893051201","full_name":"mohitmishra786/exploring-os","owner":"mohitmishra786","description":"This repository is a journey through Operating System concepts, with practical implementations in C. 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Each day focuses on a specific topic, providing theoretical understanding and hands-on coding experience.\n\n## Repository Structure\n- Each topic will have its own directory\n- Includes source code, explanations, and implementation details\n- Progressive learning path from basic to advanced OS concepts\n\n## 69 Days Exploration Roadmap\n\n| Day | Topic | Concept Category | Difficulty Level | Implementation Focus |\n|-----|-------|------------------|------------------|----------------------|\n| 1   | Process Concept | Processes | Easy | Process Definition |\n| 2   | Process States and Transitions | Processes | Medium | State Diagram Implementation |\n| 3   | Process Creation Mechanisms | Processes | Medium | Fork(), Exec() Syscalls |\n| 4   | Process Scheduling Basics | Scheduling | Medium | FCFS Algorithm |\n| 5   | Scheduling Algorithms | Scheduling | Hard | SJF, Priority, Round Robin |\n| 6   | Context Switching | Processes | Hard | Implementation Details |\n| 7   | Thread Concept | Threads | Easy | Thread Basic Understanding |\n| 8   | Thread Creation and Management | Threads | Medium | POSIX Threads |\n| 9   | Thread vs Process Comparison | Threads | Medium | Comparative Analysis |\n| 10  | Multithreading Models | Threads | Hard | User vs Kernel Threads |\n| 11  | Concurrency Fundamentals | Synchronization | Medium | Race Conditions |\n| 12  | Mutex and Semaphores | Synchronization | Hard | Implementation |\n| 13  | Deadlock Concepts | Synchronization | Hard | Prevention Strategies |\n| 14  | Deadlock Detection Algorithms | Synchronization | Hard | Banker's Algorithm |\n| 15  | Memory Management Overview | Memory | Easy | Memory Hierarchy |\n| 16  | Logical vs Physical Address | Memory | Medium | Address Translation |\n| 17  | Contiguous Memory Allocation | Memory | Medium | Allocation Strategies |\n| 18  | Paging Mechanism | Memory | Hard | Page Table Implementation |\n| 19  | Page Replacement Algorithms | Memory | Hard | FIFO, LRU, Optimal |\n| 20  | Segmentation | Memory | Medium | Segment Table |\n| 21  | Virtual Memory Concepts | Memory | Hard | Demand Paging |\n| 22  | Memory Allocation Internals (malloc, free) | Memory Management | Hard | Custom Memory Allocator |\n| 23  | Dynamic Memory Management Techniques | Memory Management | Hard | Memory Pool Strategies |\n| 24  | File System Basics | File Systems | Easy | File Concept |\n| 25  | File System Structure | File Systems | Medium | Directory Structures |\n| 26  | File Allocation Methods | File Systems | Medium | Contiguous, Linked |\n| 27  | Free Space Management | File Systems | Hard | Bit Vector, Linked List |\n| 28  | File Protection Mechanisms | File Systems | Medium | Access Control |\n| 29  | I/O System Management | I/O Systems | Medium | I/O Devices |\n| 30  | Disk Scheduling Algorithms | I/O Systems | Hard | SCAN, C-SCAN |\n| 31  | Interrupt Handling | Low-Level | Hard | Interrupt Vectors |\n| 32  | Advanced System Call Implementation | Low-Level Programming | Hard | Syscall Wrapper Design |\n| 33  | Advanced System Call Tracing | Low-Level | Hard | Syscall Interception |\n| 34  | Kernel Module Development | Low-Level | Hard | Loadable Kernel Modules |\n| 35  | Inter-Process Communication | IPC | Hard | Pipes, Message Queues |\n| 36  | Shared Memory Advanced | IPC | Hard | Low-Level Shared Memory |\n| 37  | Socket Programming Deep Dive | Networking | Hard | Raw Socket Implementation |\n| 38  | CPU Scheduling Advanced | Scheduling | Hard | Multi-Level Queues |\n| 39  | Real-Time Operating Systems Internals | Specialized | Hard | RTOS Kernel Design |\n| 40  | Linux Kernel Memory Management | Kernel | Hard | Slab Allocator |\n| 41  | Process Synchronization Advanced | Synchronization | Hard | Peterson's Algorithm |\n| 42  | Resource Allocation Graph Theory | Synchronization | Hard | Deadlock Representation |\n| 43  | Memory Fragmentation Techniques | Memory | Medium | Advanced Fragmentation |\n| 44  | Cache Management Internals | Memory | Hard | Cache Coherence |\n| 45  | File System Journaling | File Systems | Hard | Transaction Mechanisms |\n| 46  | Device Driver Development | Low-Level | Hard | Character Device Drivers |\n| 47  | Security Mechanism Implementation | Security | Hard | Access Control Kernel |\n| 48  | Process Scheduling Simulator | Scheduling | Hard | Comprehensive Simulator |\n| 49  | Network File Systems Internals | File Systems | Hard | Distributed FS Design |\n| 50  | Error Handling Kernel Mechanisms | Low-Level | Hard | Exception Management |\n| 51  | Virtual Memory Hypervisor | Advanced | Hard | Virtualization Techniques |\n| 52  | Distributed OS Algorithms | Advanced | Hard | Consensus Protocols |\n| 53  | Embedded OS Kernel Design | Specialized | Hard | Minimal Kernel |\n| 54  | Microkernel Advanced Design | Architecture | Hard | Message Passing |\n| 55  | OS Performance Profiling | Advanced | Hard | Kernel Tracing |\n| 56  | Parallel Processing Primitives | Advanced | Hard | Low-Level Parallelism |\n| 57  | Fault Tolerance Mechanisms | Advanced | Hard | Recovery Techniques |\n| 58  | Advanced Load Balancing | Advanced | Hard | Scheduling Strategies |\n| 59  | Containerization Internals | Advanced | Hard | Namespace Implementation |\n| 60  | Kernel Synchronization Primitives | Advanced | Hard | Spinlocks, RCU |\n| 61  | Security Vulnerability Analysis | Security | Hard | Buffer Overflow |\n| 62  | Cryptographic Kernel Mechanisms | Security | Hard | Encryption Primitives |\n| 63  | Malware Detection Techniques | Security | Hard | Kernel-Level Detection |\n| 64  | OS Forensics Deep Dive | Security | Hard | Kernel Trace Analysis |\n| 65  | Memory Allocator Design | Memory | Hard | Custom Heap Implementation |\n| 66  | Advanced IPC Mechanisms | IPC | Hard | Advanced Signaling |\n| 67  | Kernel Debugging Techniques | Low-Level | Hard | Kernel Crash Analysis |\n| 68  | Advanced Syscall Handling | Low-Level | Hard | Syscall Optimization |\n| 69  | Complete OS Kernel Prototype | Project | Hard | Minimal Bootable Kernel |\n\n---\n\n## Final Projects\nEach project spans 3 days, allowing for in-depth exploration and implementation.\n\n1. **Build a Minimal Bootable Kernel**  \n   - Create a simple kernel that boots and prints a message to the screen.\n\n2. **Implement a Custom Memory Allocator**  \n   - Design and implement a memory allocator with malloc, free, and realloc functionality.\n\n3. **Develop a File System Simulator**  \n   - Simulate a basic file system with directory structures, file allocation, and free space management.\n\n4. **Create a Process Scheduling Simulator**  \n   - Implement a simulator for various scheduling algorithms like FCFS, SJF, and Round Robin.\n\n5. **Design a Virtual Memory Manager**  \n   - Build a virtual memory manager with paging and page replacement algorithms.\n\n6. **Develop a Loadable Kernel Module**  \n   - Write a kernel module that interacts with the Linux kernel and performs a specific task.\n\n7. **Implement a Network File System**  \n   - Create a basic distributed file system with client-server communication.\n\n8. **Build a Real-Time Operating System Kernel**  \n   - Design a minimal RTOS kernel with task scheduling and synchronization primitives.\n  \n## Contributing\n- Detailed code implementations welcome\n- Follow coding standards\n- Include comprehensive documentation\n\n## Learning Objectives\n- Deep understanding of Operating System principles\n- Practical C programming skills\n- Real-world problem-solving techniques\n\n## Prerequisites\n- C Programming\n- Deep Computer Science Knowledge\n- Linux/Unix Kernel Understanding Recommended\n\n## License\n[LICENSE](LICENSE)\n\n## Disclaimer\nThis is an advanced educational resource for understanding Operating Systems through in-depth 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