Master Linux Basics: Commands, Filesystem Standards, and Learning Path
This guide introduces Linux fundamentals, walks through essential command‑line tools, explains the Filesystem Hierarchy Standard and key directories, outlines a structured learning path for the kernel and desktop environment, and provides security tips, command references, and a handy cheat‑sheet.
1. Understanding Linux
The article begins with a concise overview of what Linux is, its open‑source nature, and why it is a core skill for developers and system administrators.
2. Essential Linux Commands
A series of slides illustrate common command‑line utilities such as ls, cd, cat, grep, chmod, and others, showing typical usage patterns and options.
3. Structured Linux Learning Path
The author proposes a step‑by‑step learning roadmap: start with basic shell usage, then explore file permissions, package management, networking tools, scripting, and finally dive into kernel development.
4. Linux Desktop Introduction
Brief screenshots demonstrate popular desktop environments (GNOME, KDE, etc.) and how to install and configure them.
5. Filesystem Hierarchy Standard (FHS)
An illustration of the FHS explains the purpose of directories such as /bin, /sbin, /etc, /usr, /var, and /home, clarifying where applications, configuration files, and user data belong.
6. Important Directories to Watch
The guide highlights directories that require special attention for security and maintenance, e.g., /etc for system configs and /var/log for logs.
7. Linux Kernel Learning Route
A roadmap for kernel enthusiasts lists resources and milestones: reading Linux Kernel Development , compiling the kernel, exploring driver modules, and contributing to upstream projects.
8. Linux Security Coaching
Key security practices are summarized, including user privilege management, firewall configuration, SELinux/AppArmor basics, and regular patching.
9. Linux Command Reference
A comprehensive reference table (presented as an image in the original) enumerates commands, common flags, and example invocations for quick lookup.
10. Linux Command Cheat Sheet
A printable cheat‑sheet condenses the most frequently used commands and shortcuts into a single page for fast reference.
At the end, the author invites readers to scan a QR code to download the full set of resources for free.
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Liangxu Linux
Liangxu, a self‑taught IT professional now working as a Linux development engineer at a Fortune 500 multinational, shares extensive Linux knowledge—fundamentals, applications, tools, plus Git, databases, Raspberry Pi, etc. (Reply “Linux” to receive essential resources.)
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