Virtual File System

File System: A file system is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. File systems may use a data storage device such as a hard disk or CD-ROM and involve maintaining the physical location of the files, or they may be virtual and exist only as an access method for virtual data (e.g., NFS).
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Booting the Linux operating system

The first thing a computer does on start-up is a primer test (POST – Power On Self Test). This way several devices are tested, including the processor, memory, graphics card and the keyboard. . After POST, the loader from a ROM loads the boot sector, which in turn loads the operating system from the active partition.

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1. Introduction

Linus B. Torvalds wrote the first Linux kernel in 1991. Linux gained in popularity because it has always been distributed as free software. Since the source code is readily available, users can freely change the kernel to suit their needs. However, it is important to understand how the Linux kernel has evolved and how it currently works before new system programs are written.

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