Linux is an open-source operating system (OS). An operating system is a software that directly manages a system's hardware and resources, for instance, CPU and memory. The OS sits between applications, and the device makes the connections between all of your software. Further, they make the physical resource to do the work. To make it easier to understand, think about an OS like a car engine. An engine can run on its own. Nevertheless, it becomes a functional car when it's connected with transmission and wheels. In other words, without the engine running correctly and smoothly, the rest of the car won't work.
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Linux is as much a phenomenon as it is an operating system. Let's get started with Linux's history, so we can know why it is so popular!
The first version of UNIX was initially developed several decades ago and was primarily used as a research operating system in universities and colleges. High-powered desktop workstations from companies like Sun proliferated in the 1980s, and they were all based on UNIX. Many other companies entered the workstation and wanted to gain more market share. Those big corporates are HP, IBM, and Apollo, etc. However, each of them has its version of UNIX, which made the sale of software difficult.
When Mircosoft enter the high -end workstation, the market started to change. The proprietary operating systems owned by separate companies and the lack of a central authority in the UNIX world decrease UNIX's market share.
Linus Torvalds created Linux Kernal and was made available to the world for a fee. Torvalds then invited others to add to the kernel provided that they keep their contributions open. Thousands of programmers and engineers began working to enhance Linux, and the operating system proliferated. Since it is free and runs on all kinds of PC platforms, it gained a sizeable audience among hard-core developers quickly.
All in all, although Linux is harder to manage than something like Windows, it offers a significant range of flexibility and configuration options.