Free Programming Resources Hub: Cheat Sheets, Tutorials & Guides

Welcome to the free programming resources hub—your comprehensive collection of curated cheat sheets, tutorials, and learning guides for developers, system administrators, and cybersecurity professionals. Whether you're learning Python, mastering Linux commands, exploring ethical hacking, or diving into web development, this resource center provides high-quality reference materials designed for beginners and intermediate learners. Access practical cheat sheets, visual infographics, command references, and step-by-step tutorials covering programming languages, networking protocols, automation tools, and AI technologies—all organized for efficient learning and quick reference without unnecessary complexity.

Cheatsheet 223KB

DNS

How DNS works infographic: resolver, ISP cache, root, TLD, and authoritative lookup flow.

Cheatsheet 74KB

DHCP

How DHCP works: DORA steps—Discover, Offer, Request, Acknowledge—explained visually.

Cheatsheet 53KB

Linux architecture

Linux architecture diagram: hardware, kernel, shell, utilities, and applications overview.

Cheatsheet 173KB

Basic Linux file permissions

Basic Linux file permissions guide: rwx, users/groups/others, and file types.

Cheatsheet 148KB

Linux AWK cheatsheet

Linux AWK cheatsheet: patterns, variables, regex, loops, and common examples.

Cheatsheet 343KB

Linux boot process

Linux boot process infographic: BIOS/UEFI, GRUB, kernel init, systemd, services start.

Cheatsheet 503KB

Linux commands cheatsheet

Linux commands cheatsheet: files, processes, networking, SSH, users, permissions, archives.

Cheatsheet 355KB

Linux shell redirection

Linux shell redirection guide: stdin/stdout/stderr, >, >>, <, 2>, 2>&1 examples.

PDF 1.57MB

Python Data Science Cheat Sheets

Python data science cheatsheets: NumPy, Pandas, Matplotlib, Seaborn, scikit-learn & more.

PDF 1.61MB

Network Administrator Interview Questions (Scenarios)

Scenario-based network admin interview questions: routing, VLANs, DNS, DHCP, security.

PDF 294KB

70+ Vital Windows CMD Commands

Must-know Windows Command Prompt commands for admin and cybersecurity tasks.

PDF 286KB

100 Essential Linux Commands

Quick Linux command reference: files, processes, networking, permissions, archives.

About Website

TechTutorials is a beginner-friendly learning platform offering step-by-step tutorials in programming, ethical hacking, networking, automation, and Windows setup. Learn through hands-on projects, clear explanations, and real-world examples using practical tools and open-source resources—no signups, no tracking, just actionable knowledge to accelerate your technical skills.