Is the Operating Systems Internals course free?

Yes, the Operating Systems Internals course on AiTechWorlds is completely free. No signup, no payment, and no hidden fees. All 16 lessons are immediately accessible.

How long does the Operating Systems Internals course take?

The Operating Systems Internals course takes approximately 10 hours to complete, spread across 16 lessons organized into 7 chapters.

What level is the Operating Systems Internals course?

This is a Advanced level course. Solid foundational knowledge of the subject is recommended.

Operating Systems Internals — Free Advanced Course | AiTechWorlds

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What You'll Learn

Explain monolithic vs microkernel architecture and why Linux chose monolithic

Trace the complete path of a system call from user space to kernel and back

Describe how the Linux kernel manages processes using task_struct

Explain POSIX threads, the N:M threading model, and kernel thread implementation

Analyze the Linux CFS (Completely Fair Scheduler) algorithm

Understand slab allocator, buddy system, and virtual memory areas in Linux

Explain demand paging, page fault handling, and page replacement in Linux

Describe the VFS layer and how ext4, NTFS, and APFS store data on disk

Implement synchronization with mutexes, spinlocks, and RCU

Explain OS security: capabilities, namespaces, cgroups, and SELinux basics

About This Course

You know what an operating system does. This course teaches you how it actually does it.

Where the introductory OS course explains concepts, this course explains implementations. We look at actual Linux kernel code structures, real scheduling algorithms in production (Linux CFS), actual memory management data structures, real file system on-disk formats (ext4, NTFS), and actual security mechanisms. By the end, you will understand why Linux is designed the way it is, what tradeoffs were made, and how to reason about OS behavior from first principles.