Original companion notes for Abraham Silberschatz, Peter Baer Galvin, and Greg Gagne, Operating System Concepts, 10th edition. Every chapter is rewritten in simpler language with introduction, explanation, key concepts, examples, FAQs, takeaways, and conclusion.
What an operating system does, why it exists, how it mediates hardware, programs, users, and the core ideas that appear throughout the book.
chapter 2OS services, system calls, system programs, layering, microkernels, modules, and the practical tradeoffs behind kernel design.
chapter 3Process model, states, process control blocks, IPC, and client-server basics in simpler language.
chapter 4Threads, multithreading models, multicore issues, and why concurrency creates both speed and bugs.
chapter 5Scheduling goals, classic algorithms, latency, throughput, fairness, and multicore scheduling tradeoffs.
chapter 6Critical sections, locks, semaphores, monitors, atomic instructions, and memory-order basics.
chapter 7Bounded buffer, readers-writers, dining philosophers, and how classic patterns show up in real systems.
chapter 8Deadlock conditions, prevention, avoidance, detection, and recovery in clear, practical language.
chapter 9Address binding, allocation, paging, segmentation, and swapping explained with real mental models.
chapter 10Demand paging, page faults, replacement, thrashing, and the illusion of large memory.
chapter 11Disks, SSDs, scheduling, swap space, RAID, and why storage layout changes system performance.
chapter 12Device controllers, drivers, interrupts, DMA, buffering, caching, and the flow of I/O through the OS.
chapter 13Files, directories, access methods, links, permissions, and mounting as users and developers see them.
chapter 14Allocation methods, free-space tracking, directory structures, recovery, and consistency work.
chapter 15VFS, inodes, caches, journaling, and the internal pieces that make modern file systems practical.
chapter 16Threats, authentication, malware, privilege abuse, and the operating-system view of defense.
chapter 17Protection domains, access matrices, ACLs, capabilities, and least privilege in system design.
chapter 18Hypervisors, VM models, containers, emulation, and why isolation matters in modern infrastructure.
chapter 19Remote communication, distributed file systems, naming, failure handling, and networked services.
chapter 20Linux kernel structure, processes, scheduling, memory, VFS, modules, and why Linux is a key case study.
chapter 21Windows architecture, threads, memory, I/O, security, and the major pieces of the Windows design.