# Free

> Free cybersecurity PDFs from Codelivly: Linux fundamentals, a hacker roadmap, cheat sheets for Linux and Metasploit, interview questions, a VPN guide and more.

Canonical: https://resources.codelivly.com/product-category/free/

Free cybersecurity PDFs from Codelivly: Linux fundamentals, a hacker roadmap, cheat sheets for Linux and Metasploit, interview questions, a VPN guide and more. No payment needed, just check out and download the full PDF instantly.

## Books (11)

- [AI for Hackers: A Beginner's Guide to Machine Learning in Cybersecurity](https://resources.codelivly.com/product/ai-for-hackers-a-beginners-guide/) (Free) - Download a free AI hacking guide PDF for beginners: prompt injection, AI OSINT, LLM security flaws and your first AI hacking lab in Python. Grab it now.
- [Practical Malware Development Handbook for Red Teams](https://resources.codelivly.com/product/practical-malware-development-handbook-for-red-teams/) (Free) - Download a free malware development handbook PDF: 330+ pages of red team tradecraft on loaders, C2 beacons, evasion and 5 hands-on labs. Grab your copy now.
- [Hacker Roadmap: Hack Everything & Own the Web](https://resources.codelivly.com/product/hacker-roadmap/) (Free) - Download a free ethical hacking roadmap PDF covering networking, Nmap recon, exploitation, cloud, defence and certifications, plus hands-on labs. Download it.
- [Linux CMD Cheatsheet – Quick, Practical, and Essential](https://resources.codelivly.com/product/linux-cmd-cheatsheet-quick-practical-and-essential/) (Free) - Grab this free Linux commands cheat sheet PDF: 60+ essential commands with syntax and examples for files, users, networking and monitoring. Download it now.
- [The Cybersecurity Interview Bible – Master Every Question with Confidence](https://resources.codelivly.com/product/the-cybersecurity-interview-bible/) (Free) - Cybersecurity interview questions and answers PDF free: 100+ expert-verified Q&As on network security, SOC ops, incident response and crypto. Download now.
- [Advanced Linux System Admin Interview Questions](https://resources.codelivly.com/product/advanced-linux-system-admin-interview-questions/) (Free) - Free advanced Linux sysadmin interview questions PDF: 100+ real-world questions with answers on systemd, SELinux, LVM, RAID and Kubernetes. Download it now.
- [The Hacker Mindset](https://resources.codelivly.com/product/the-hacker-mindset/) (Free) - Download the Hacker Mindset book free PDF: a 50-page action plan on systems thinking, automation and ethical problem solving you can read in one afternoon.
- [Metasploit Cheatsheet](https://resources.codelivly.com/product/metasploit-cheatsheet-codelivly/) (Free) - Download a free Metasploit cheat sheet PDF covering msfconsole setup, module search, payload options, sessions and post-exploitation commands. Grab your copy.
- [Web Hacking Essentials: XSS & SQLi Pocket Guide](https://resources.codelivly.com/product/web-hacking-essentials-xss-sqli-pocket-guide/) (Free) - Grab this free XSS payload cheat sheet PDF: reflected, stored and DOM payloads, filter bypasses, Burp Suite workflows and proven defenses. Download it now.
- [The Ultimate Virtual Private Network (VPN) Guide](https://resources.codelivly.com/product/the-ultimate-virtual-private-network-vpn-guide/) (Free) - Download this free VPN guide PDF and learn tunneling, encryption, kill switches and how OpenVPN, IKEv2 and WireGuard compare. Plain English, zero cost.
- [Linux Fundamentals: Beginner's Guide for Cybersecurity](https://resources.codelivly.com/product/linux-fundamentals-beginners-guide-for-cybersecurity/) (Free) - Download the free Linux fundamentals PDF for cybersecurity beginners: 53 pages, 20 chapters, 5 hands-on labs and 150+ commands. Start at the terminal today.

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