topics/01-what-is-linux

What Is Linux?

Let's start from the absolute beginning. By the end of this page you'll know what Linux is, where it came from, and why millions of people choose it over Windows or macOS.

The short answer

Linux is an operating system — the master software that makes your computer usable, just like Windows or macOS. It manages your hardware, runs your programs, and connects everything together. The big difference: Linux is free and open source, meaning anyone can download it, use it, study its code, and share it. Forever.

Technically speaking, “Linux” is the name of the kernel — the core that talks directly to your hardware. Everything else (your desktop, apps, package manager) is built around that kernel. You'll sometimes see the full system called GNU/Linux, because many of the surrounding tools come from the GNU project. In everyday conversation, everyone just says “Linux”.

Analogy: if your computer is a car, the kernel is the engine, and the operating system is the whole car — steering wheel, seats, dashboard and all. Linux (the kernel) plus GNU tools and a desktop make the complete ride.

try it: the system tells you its name

alex@pc:~$uname -aLinux pc 6.8.0-45-generic #45-Ubuntu SMP x86_64 GNU/Linux

story/1991

A very short history

Linux didn't appear from nowhere — it stands on decades of shared, open code.

1969

UNIX is born

At Bell Labs, Ken Thompson and Dennis Ritchie create UNIX, the ancestor of nearly every modern operating system.

1983

The GNU project

Richard Stallman launches GNU to build a completely free UNIX-like system — every tool except one crucial piece: a free kernel.

1991

Linus Torvalds writes a kernel

A 21-year-old Finnish student posts his hobby kernel online: “just a hobby, won't be big and professional.” It became Linux.

Today

Linux runs everything

All of the world's fastest supercomputers, most web servers, every Android phone, smart TVs, cars, routers — and millions of desktops.

compare/os

Linux vs Windows vs macOS

No operating system is “best” — they simply make different trade-offs.

	Linux	Windows	macOS
Price	Free	Paid license	Comes with a Mac
Source code	Open — anyone can read it	Closed	Mostly closed
Customisation	Change literally everything	Limited	Limited
Viruses & malware	Rare target, strong permissions	Biggest target	Rare, but exists
Runs on	Almost any hardware, old or new	Most PCs	Apple hardware only
Best known for	Servers, development, privacy, learning	Gaming, office software	Creative work, polish

One honest caveat: anti-cheat in some competitive games and a few commercial apps (Adobe, MS Office desktop versions) still don't run natively on Linux. Browser-based versions and great open-source alternatives usually fill the gap.

answer/why

So… why do people love it?

It's free, honestly

Not “free trial” free — free as in freedom. No ads, no telemetry-by-default, no forced upgrades.

Privacy & security

You control what runs on your machine — and thousands of eyes worldwide audit the code.

Total control

Don't like the desktop? Swap it. Want automation everywhere? Script it. Your computer, your rules.

Career superpower

DevOps, cloud, cybersecurity, backend dev — nearly all of it runs on Linux servers.

A huge community

Wikis, forums, and millions of users worldwide. Almost every problem you'll hit is already solved online.

Fast & efficient

Linux can be feather-light or feature-rich. It famously breathes new life into old hardware.

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