Liangxu Linux

Oct 27, 2024 · Fundamentals

How to Build a Custom Root Filesystem for Embedded Linux with BusyBox

This guide explains the concepts of Linux file systems, compares root and regular file systems, lists common embedded flash file systems, outlines required root‑FS directories, and provides a step‑by‑step procedure—including cross‑compilation, BusyBox configuration, mounting, and ramdisk creation—to build and test a minimal root filesystem for an embedded device.