Linux explained one part at a time: boot the Linux kernel alone and watch it panic, then build a Linux system around it, from PID 1, BusyBox and glibc to the initramfs, GRUB and systemd, until it's an Ubuntu server you can log in to, and see what a Linux distribution is, where the kernel comes from, and how Ubuntu runs in a virtual machine, a Docker container and WSL 2.
► Try it yourself: https://antonputra.com/exercises/linux-explained/
► Follow the full roadmap: https://www.youtube.com/playlist?list=PLWzN82rNbUkg
▬▬▬▬▬▬▬ Timestamps ⏰ ▬▬▬▬▬▬▬
0:00 What does Linux need before it's a system?
1:02 Linux alone: a kernel panic, and Linux 0.01
3:36 One first program: PID 1, fork and exec
5:53 The tools and the library: BusyBox and GNU
8:59 Inside the kernel: device files and drivers
11:39 The disk problem: modules, initramfs, GRUB
14:44 A first program for a server: systemd
17:01 From parts to a Linux distribution: Ubuntu
20:09 Where the Linux kernel comes from
22:30 Three ways to run Ubuntu: virtual machine, container, WSL 2
26:15 The exercise, and next: Linux commands
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