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How Operating Systems Work
in 5 Days

Processes, memory management, file systems, CPU scheduling, and virtual memory — the internals every developer and engineer should understand.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

How Operating Systems Work in 5 Days

Free 5-day operating systems course. Processes, memory, file systems, scheduling, and virtual memory.

  • Understand process lifecycle: creation, states, and termination
  • Explain virtual memory, paging, and page faults
  • Compare file system designs: ext4, NTFS, APFS
  • Analyze CPU scheduling algorithms and their tradeoffs
  • Understand inter-process communication (IPC) mechanisms
  • Read and interpret OS performance metrics
Processes
& threads
Virtual
memory
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
Processes & Threads
Process lifecycle, PCB, thread models, context switching, fork and exec
PCBfork/execcontext switch
→
02
Memory Management
Segmentation, paging, page tables, TLB, demand paging, working set
pagingTLBdemand paging
→
03
File Systems
VFS, inodes, directory trees, journaling, ext4, NTFS, APFS internals
inodesjournalingVFS
→
04
CPU Scheduling
FIFO, SJF, Round Robin, priority scheduling, CFS in Linux, real-time
Round RobinCFSpriority
→
05
Virtual Memory & IPC
Swap, memory-mapped files, pipes, sockets, shared memory, semaphores
swapmmapsemaphores
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has working examples and an exercise you can finish in under an hour.

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