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Sarvesh Kesharwani
Sarvesh Kesharwani

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What is a Kernel in Operating System in a nutshell?

The kernel of Linux is the heart of the operating system that controls and manages all system resources.
In order to understand kernel better you can think of things which it is not, in other words if kernel is a part of OS then what else is there in OS which it is not.

A kernel is not:

  • User Interface
  • System Services
  • File System
  • Device Drivers
  • Utilities
  • Applications

User Interface: The user interface (UI) is the part of the operating system that allows users to interact with the system. This can include graphical user interfaces (GUIs), command-line interfaces (CLIs), or other types of interfaces.

System Services: The system services are a set of background processes and services that provide additional functionality to the operating system. These can include network services, printing services, security services, and more.

File System: The file system is a hierarchical structure that is used to organize and store files and directories on disk. The file system provides a standard interface for accessing and managing files, and it includes features like permissions, file attributes, and file locking.

Device Drivers: Device drivers are software components that allow the operating system to communicate with hardware devices like printers, scanners, and network adapters. These drivers provide an interface between the hardware and the operating system, allowing applications to use the hardware without needing to know the details of how it works.

Utilities: Utilities are small programs that provide additional functionality to the operating system. These can include things like text editors, system monitors, and command-line tools.

Applications: Finally, an operating system includes a variety of applications that are used to perform common tasks like browsing the web, sending email, and creating documents.

All of these components work together to provide a complete and functional environment for running applications and managing system resources.

In summary, the kernel of an operating system is the core component that manages system resources and provides services to user-level processes and applications. The Linux kernel is a concrete example of a kernel that provides a stable, efficient, and versatile environment for running a wide range of applications and services.

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