Linux, Operating Systems & Networking

A practical systems path toward NVIDIA prep: Linux CLI for systems work, processes, threads, synchronization, virtual memory, file descriptors, TCP/UDP, sockets, debugging (gdb/strace/perf), and a small C++ project.

Lesson 0: Why Understand the System and the Network at All?
Lesson 1: Linux Filesystem Hierarchy
Lesson 2: File Permissions & Linux Security Model
Lesson 3: Environment Variables & LD_LIBRARY_PATH
Lesson 4: Package Management & System Info
Lesson 5: What is a Process? /proc and Memory Layout
Lesson 6: fork() — Creating a Child Process
Lesson 7: wait() — Reaping Children and Preventing Zombies
Lesson 8: Signals — Inter-Process Communication
Lesson 9: POSIX Threads — Create and Join
Lesson 10: Mutex — Protecting Shared Data
Lesson 11: Condition Variables — Thread Coordination
Lesson 12: Data Races, Deadlock and Atomics
Lesson 13: Virtual Address Space
Lesson 14: mmap() — Memory-Mapped Files
Lesson 15: CPU Cache and Memory Locality
Lesson 16: File Descriptors — open, read, write
Lesson 17: Pipes and FIFO — IPC Between Processes
Lesson 18: Non-blocking I/O and epoll
Lesson 19: Memory-mapped I/O vs Buffered I/O
Lesson 20: IP, TCP, UDP — The Protocol Stack
Lesson 21: TCP Sockets — Server and Client
Lesson 22: UDP Datagrams — sendto and recvfrom
Lesson 23: Network Debugging — ss, tcpdump, netstat
Lesson 24: strace and ltrace — Tracing System Calls
Lesson 25: gdb — Debugging Native Code and Core Dumps
Lesson 26: perf, Flamegraphs & Capstone — TCP Echo Server