Method and device for optimizing loading and booting of an operating system in a computer system via a communication network

A method of operating a computer system in communications, via a communication network, with a server comprising an image of a kernel of a minimal operating system and an image of an associated file system for the computer system includes loading, via the communication network, the kernel image from the server to the computer system in accordance with a network transfer protocol interface, and loading, via the communication network, the file system image from the server to the computer system in accordance with the same network transfer protocol interface used to load the kernel image, wherein the loading of the kernel image from the server to the computer system is launched before the loading of the file system image from the server to the computer system is completed, and wherein the loading of the file system image from the server to the computer system is launched before the loading of the kernel image from the server to the computer system is completed.