Open Source Courses.
Hands-on labs, in your browser.

Learn open source technologies through hands-on, browser-based courses covering Linux fundamentals, system administration, and open source tools.

Browse courses View all topics

Career Pathways

Build a foundation in open-source technologies used across cloud, DevOps, and system administration roles worldwide.

Available Courses (11)

NDG Ethical Hacking v2

Practice offensive security techniques: reconnaissance, vulnerability analysis, exploitation, and post-exploitation in isolated lab environments.

2 modules 28 labs
From $50.00 Intermediate

NDG Forensics v2

Practice digital forensic investigation techniques: evidence collection, file system analysis, and incident documentation in isolated lab environments.

1 modules 22 labs
From $50.00 Intermediate
 Cert

Linux Essentials

Learn the fundamentals of the Linux operating system, command line, and open-source concepts. Aligned with the LPI Linux Essentials certification.

23 modules
Free Foundational
 Cert

Introduction to Linux 1

Build foundational Linux system administration skills: file management, package installation, user permissions, and basic networking. Aligned with LPI LPIC-1 (101-500) certification objectives.

12 modules
From $29.95 Intermediate
 Cert

Introduction to Linux 2

Advance your Linux administration skills: shell scripting, system services, networking fundamentals, and security. Aligned with LPI LPIC-1 (102-500) certification objectives.

10 modules
From $29.95 Intermediate

NDG Sandbox for Proxmox VE

A browser-based sandbox for Proxmox VE. Deploy VMs, configure storage, and work through the platform's virtualization features.

1 modules 1 labs
From $75.00 Foundational
 Cert

NDG Security+ v4

Practice network security skills: threat mitigation, access control, cryptography, and risk management. Aligned with CompTIA Security+ (SY0-701) exam objectives.

1 modules 26 labs
From $60.00 Intermediate

Proxmox VE 8: AAO

Advanced Proxmox VE administration: VM migration, API automation, advanced networking, Ceph distributed storage, and real-world challenge scenarios.

1 modules 18 labs
From $125.00 Advanced

Proxmox VE 8: Setup and Management

Install and configure Proxmox VE, deploy virtual machines and containers, and manage storage and backup solutions through hands-on labs.

2 modules 25 labs
From $125.00 Foundational

Proxmox VE 9: Setup and Management

Install and configure Proxmox VE 9, deploy virtual machines and containers, and manage storage and backup solutions through hands-on labs.

2 modules 25 labs
From $125.00 Foundational

Linux Unhatched

A free introduction to Linux. Learn basic command-line navigation, installation, and configuration in your browser.

6 modules
Free Foundational

Frequently Asked Questions

What open source technologies are covered?

NDG Online open source courses focus on Linux (from foundational to advanced), including Linux Essentials, system administration, and LPIC certification preparation. Courses use popular distributions like Ubuntu and CentOS.

Are open source courses free?

Some open source courses are available at no cost, including Linux Unhatched. Other courses may have associated fees. Check individual course pages for current pricing.

Do these courses align with certifications?

Yes. Open source courses align with LPI Linux Essentials, LPIC-1, CompTIA Linux+, and Red Hat certifications. Specific alignment is listed on each course page.