Command Line Dojo
Master Windows CMD and Linux terminal commands through 73 hands-on cybersecurity challenges. Build muscle memory, sharpen your CLI skills, and prepare for real-world security operations.
Why Command-Line Mastery Matters
The terminal is the hacker’s primary interface. Whether you are conducting penetration tests, analyzing logs in a SOC, or hardening Linux servers, fluency at the command line separates professionals from amateurs.
Speed & Efficiency
Perform complex operations in seconds that would take minutes through a GUI. Automate repetitive tasks with scripts and one-liners.
Security Tooling
Every major cybersecurity tool runs from the command line: Nmap, Metasploit, Wireshark (tshark), SQLMap, Hydra, and hundreds more.
Headless Systems
Production servers, cloud instances, and compromised targets often have no GUI. The terminal is your only interface.
Certification Readiness
OSCP, RHCSA, Security+, and CISSP all require command-line fluency. The hands-on portions of OSCP and PNPT demand it.
Forensics & IR
In incident response, you triage through the CLI: check processes, inspect logs, analyze network connections, and hunt persistence mechanisms.
Scripting Foundation
Mastering the CLI is the gateway to shell scripting (Bash, PowerShell). Automate reconnaissance, parsing, and exploitation workflows.
Skills You Will Practice
How CMD Forge Works
Choose Your OS
Toggle between Windows CMD and Linux terminal. Each OS has its own set of challenges reflecting real-world command syntax.
Pick a Difficulty
Start with Easy for fundamentals, Medium for intermediate workflows, or Hard for penetration-testing and incident-response scenarios.
Read the Context
Each challenge shows the current directory and a task description. You type the exact command you would run in a real terminal.
Submit & Learn
Get instant feedback on every attempt. Use hints when stuck, skip when needed, and track your progress with score, streak, and combo metrics.
Pair CMD Forge with Free Tools
The commands you practice here power the industry-standard tools every cybersecurity professional uses. Explore our curated collection of free security tools.
Nmap
Network discovery and security auditing – the commands you practiced with netstat and ss map directly to Nmap workflows.
Wireshark
Network protocol analyzer – complement your ipconfig, netstat, and ARP table skills with deep packet inspection.
Metasploit
The penetration testing framework – shell access, port scanning, and process management commands practiced here are used inside Meterpreter sessions.
Level Up with Instructor-Led Training
CMD Forge builds foundational command-line skills. Take the next step with A7 Security Hunters’ live, instructor-led cybersecurity courses.
Kali Linux Course
Master the penetration testing distribution used by ethical hackers worldwide – 12 modules, hands-on labs.
Red Hat Linux Server
Enterprise Linux administration – RHCSA/RHCE preparation with 16 comprehensive modules.
Black Hat Python
Offensive Python programming for exploit development, automation, and red team operations.
Frequently Asked Questions
CMD Forge is a free interactive command-line practice tool by A7 Security Hunters that helps you master both Windows CMD and Linux terminal commands through hands-on challenges across three difficulty levels. With 73 real-world cybersecurity scenarios, you build muscle memory for the commands used daily by ethical hackers, SOC analysts, and system administrators.
Yes, CMD Forge is completely free. There is no registration, no subscription, and no paywall. A7 Security Hunters built this tool as part of our mission to democratize cybersecurity education and make command-line proficiency accessible to everyone.
CMD Forge covers both Windows CMD and Linux/Unix shells. The Windows module has 37 challenges across easy, medium, and hard difficulties, while the Linux module has 36 challenges. You can switch between OS modes with a single click.
Three difficulty levels: Easy (basic file operations and system queries), Medium (network diagnostics, process management, redirection), and Hard (advanced forensics, privilege escalation reconnaissance, log analysis). Hard challenges are inspired by real penetration testing and SOC workflows.
No installation required. CMD Forge runs entirely in your browser. Simply visit the page, select your OS (Windows or Linux), choose a difficulty level, and start practicing. There is no backend server or database.
Your score increases with each correct answer. Bonus points are awarded for streak completions (consecutive correct answers), combo multipliers (correct answers without using hints), and clearing an entire difficulty level. The high score is saved locally in your browser.
Yes. Each challenge has a hint button that reveals contextual guidance without penalties (though it breaks your combo streak). You can also skip any challenge to move to the next one. Skipped challenges reset your streak but not your score.
Absolutely. The Easy difficulty is designed for complete beginners who have never opened a terminal. Each challenge includes clear context (which directory you are in), a task description, and a generous hint system. Start with Easy mode on Linux for the gentlest learning curve.
Challenges span system administration, network diagnostics, process analysis, file system forensics, user enumeration, privilege escalation reconnaissance, log parsing, cryptographic hashing, and persistence hunting. Hard challenges are directly applicable to penetration testing and incident response.
CMD Forge is unique in covering both Windows CMD and Linux in a single interface, with cybersecurity-specific challenges designed by A7 Security Hunters instructors. Unlike generic CLI games, our challenges map to real-world security workflows: SUID hunting, ARP table analysis, hotfix enumeration, and cron job discovery.
Yes. The command-line skills practiced in CMD Forge directly support certifications like CompTIA Security+, CEH, OSCP, CISSP, and Red Hat RHCSA/RHCE. Command-line proficiency is tested in practical exams (OSCP, PNPT) and is essential for SOC Tier 1 and penetration testing roles.
Yes. A7 Security Hunters offers comprehensive instructor-led cybersecurity training programs including Kali Linux, Red Hat Linux Server Administration, Black Hat Python, and Digital Forensics courses that build upon the foundational skills practiced in CMD Forge. Visit our Courses page to explore all programs.
Your score, streak, combo, level, and high score are saved locally in your browser’s localStorage. No data is sent to any server. Clearing your browser data will reset your progress.
CMD Forge is fully responsive and works on tablets and mobile devices. However, for the best experience, we recommend using a desktop or laptop with a physical keyboard since command-line practice involves typing commands.
A7 Security Hunters maintains a suite of proprietary security assessment tools used exclusively in our instructor-led training and professional services. These tools are private and not available for public download. CMD Forge, along with other free resources on our site, represents our commitment to open cybersecurity education while our advanced tooling remains part of our professional ecosystem.
A7 Security Hunters Proprietary Tools: The interactive challenge engine powering CMD Forge is a publicly available educational resource. A7 Security Hunters maintains a suite of proprietary security assessment and automation tools used exclusively in our instructor-led training programs and professional penetration testing services. These tools are private and not distributed publicly. CMD Forge, the Free Cybersecurity Tools directory, and our educational content represent our commitment to open, accessible cybersecurity education while our advanced operational tooling remains part of our professional service ecosystem.