> For the complete documentation index, see [llms.txt](https://notes.mikaelsamvelian.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://notes.mikaelsamvelian.com/linux-fundamentals/introduction.md). # Introduction to Linux Here are some core concepts behind Linux that are important to know about: ## Concepts * Kernel * Distribution * Boot Loader * Service * Filesystem * X Window System * Desktop Environment * Command Line ## Kernel **Think of it as the brain of your computer.** It manages hardware, system resources, and communication between software and hardware.
## Distribution A version of Linux that includes **the linux kernel plus additional software, tools, and package management.** It's like a customized Linux operating system, such as Ubuntu or Fedora. ## Boot Loader A small program that runs first when you start your computer, loading the operating system (like GRUB). It's the gatekeeper to the OS. ## Service A program or process that runs in the background to provide functionality (e.g., web server, database). Services keep the system running smoothly without direct interaction. ## Filsystem The way data is stored and organized on your computer. It's like the file cabinet of your computer where everything is saved and accessed. ## X Window System The system that handles the graphical display on your screen (windows, icons, etc.) and enables interaction with input devices (like the mouse and keyboard). It's **the foundation** for your graphical user interface (GUI), but **doesn't include the look and feel of the interface itself**. ## Desktop Environment The visual user interface that lets you interact with your computer (e.g., GNOME, KDE). It includes icons, windows, and apps, making your system **visually functional**. ## Command Line A text-based interface to interact with the system by typing commands. It's a powerful, faster way to control your computer compared to clicking around.