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Explore the process of building and booting the simplest possible Linux system in this comprehensive tutorial. Begin by configuring and building the kernel, understanding native vs cross compiling, and creating an initramfs. Learn how to install and boot the system, both under QEMU and on real hardware. Dive into the init process and system bringup, run applications, and add an example server like sshd. Finally, incorporate a native toolchain to compile "hello world" on the target system. Gain insights from Rob Landley, an experienced developer who has maintained BusyBox, TinyCC fork, and currently maintains Toybox and Aboriginal Linux.
