What is VFS in Linux?

The Virtual File System (VFS) layer [1] provides a uniform interface for the kernel to deal with various I/O requests and specifies a standard interface that each file system must support.

How does a VFS work?

A virtual file system (VFS) is programming that forms an interface between an operating system’s kernel and a more concrete file system. The VFS serves as an abstraction layer that gives applications access to different types of file systems and local and network storage devices.

What are the important features of VFS?

The purpose of a VFS is to allow client applications to access different types of concrete file systems in a uniform way. A VFS can, for example, be used to access local and network storage devices transparently without the client application noticing the difference.

What is Sysfs in Linux?

sysfs is a pseudo file system provided by the Linux kernel that exports information about various kernel subsystems, hardware devices, and associated device drivers from the kernel’s device model to user space through virtual files.

How virtual file works in Linux?

The Linux technology which provides this abstraction is called the Virtual Filesystem, or VFS for short. The VFS provides the abstract interface for all file-related Linux functions without burdening the user with the implementation details of the particular filesystem which stores a given file.

How does filesystem work in Linux?

The Linux filesystem unifies all physical hard drives and partitions into a single directory structure. It all starts at the top–the root (/) directory. All other directories and their subdirectories are located under the single Linux root directory.

How is Linux file system implemented?

Linux file system has a hierarchal file structure as it contains a root directory and its subdirectories. All other directories can be accessed from the root directory. A partition usually has only one file system, but it may have more than one file system.

What is Linux VFS What are the main object types of Linux VFS explain it?

What is var directory in Linux?

/var is a standard subdirectory of the root directory in Linux and other Unix-like operating systems that contains files to which the system writes data during the course of its operation.

What are inodes and Dentries?

An Inode is a data structure which provides a representation of a file. Dentries is a data structure which represents a directory or a folder. So, dentries can be used to store cache, if they exist then store or check from memory.