Understand the hardware the OS virtualizes — CPU pipelines, the memory hierarchy, caches, storage tiers, and how the fetch-execute loop becomes the foundation for every systems topic that follows.

Understand the role of an operating system as an intermediary between hardware and software, covering kernel types, user vs kernel mode, system calls, the boot process, and the fundamental abstractions provided by modern OSes.

Learn how the OS creates, schedules, and terminates processes — including process states, context switching, and the classic CPU scheduling algorithms with an interactive Gantt-chart visualizer.

Explore threads as lightweight units of execution within a process, covering thread models, synchronization primitives, and common concurrency challenges like races and deadlock.

Dive into how the OS manages physical and virtual memory — paging, segmentation, page tables, TLB, and the mechanics of virtual address translation — with an interactive page-replacement simulator and address translator.

Examine the boundary between user space and kernel space — how system calls work, their performance cost, and the standard POSIX API, with strace-based tracing.

Understand how the OS organizes persistent data — inodes, directory structures, file allocation methods, journaling, and the Virtual File System layer.

Get hands-on with Linux — the filesystem hierarchy, users and permissions, processes and signals, systemd services, and package management — the environment where systems engineering actually happens.

Debug production systems like a professional — strace and gdb, profilers, core dumps, flamegraphs, and the systematic workflow that separates guessing from diagnosis.