What is Linux
Linux is an open-source Unix-like operating system kernel created by Linus Torvalds in 1991.
The kernel is the core part of the operating system responsible for:
- hardware communication
- memory management
- process scheduling
- device management
- filesystem access
- networking
However, when people say “Linux”, they usually mean a complete operating system built around the Linux kernel.
A Linux operating system typically includes:
- Linux kernel
- GNU utilities
- shell environment
- package manager
- system libraries
- desktop environment or server tools
Why Linux Became So Important
Linux became dominant because it is:
- stable
- secure
- scalable
- flexible
- open-source
- highly customizable
Modern infrastructure heavily depends on Linux.
Examples include:
| Technology | Runs on Linux |
|---|---|
| AWS cloud servers | Yes |
| Kubernetes | Yes |
| Docker containers | Yes |
| Android | Linux kernel |
| Web servers | Mostly Linux |
| Supercomputers | Mostly Linux |
Today, most internet services you use are powered by Linux servers.
Linux Is Everywhere
Linux is not limited to servers.
It runs on:
- routers
- TVs
- smart devices
- Raspberry Pi
- enterprise storage systems
- cloud infrastructure
- CI/CD pipelines
Even if users never see Linux directly, it powers much of modern computing.
Linux vs Windows
Linux and Windows are fundamentally different operating systems.
| Linux | Windows |
|---|---|
| Open-source | Proprietary |
| Highly customizable | Limited customization |
| Dominates servers | Dominates desktops |
| CLI-centric | GUI-centric |
| Strong scripting ecosystem | GUI-oriented workflows |
| Preferred in DevOps | Common in office environments |
Linux administrators usually work heavily in the terminal.
This is one of the biggest mindset changes for beginners.
Why the Linux Terminal Matters
The Linux shell allows administrators to:
- automate tasks
- manage servers remotely
- process logs
- monitor systems
- deploy applications
- troubleshoot infrastructure
Modern DevOps workflows rely heavily on command-line tools.
This is why Linux knowledge is extremely valuable in technical careers.