In this chapter, you will learn about the root filesystem and its structure. You will also be presented with information about the root filesystem's content, the various device drivers available, and its the communication with the Linux kernel. We will slowly make the transition to the Yocto Project and the method used to define the Linux root filesystem's content. The necessary information will be presented to make sure that a user will be also able to customize the rootfs filesystem according to its needs.

The special requirements of the root filesystem will be presented. You will be given information on its content, subdirectories, defined purposes, the various filesystem options available, the BusyBox alternative, and also a lot of interesting features.

When interacting with an embedded environment, a lot of developers would start from a minimal root filesystem made available by a distribution provider, such as Debian, and using a cross-toolchain will...