1.1.1 Operating System vs Kernel
To understand Linux correctly, it is important to distinguish between an operating system and a kernel.
Although the terms are often used interchangeably, they are not the same.
What Is an Operating System?
An operating system (OS) is the complete environment that allows users and applications to interact with hardware.
An operating system typically includes:
- A kernel
- System utilities and tools
- Libraries
- User interfaces (command-line or graphical)
Examples of operating systems include Linux-based systems, Windows, and macOS.
What Is a Kernel?
The kernel is the core component of an operating system.
Its main responsibilities include:
- Managing CPU processes
- Handling memory allocation
- Controlling hardware devices
- Providing a bridge between software and hardware
The kernel runs at the lowest level and is always active while the system is running.
How Linux Fits In
Technically speaking:
- Linux is a kernel
- A “Linux operating system” is built by combining:
- The Linux kernel
- System tools
- Libraries
- User applications
This distinction explains why there are many different Linux distributions, all sharing the same kernel but offering different user experiences.
📌 Summary:
The kernel is the core; the operating system is the complete system built around it.