Lab notes, not slide decks

Free hands-on courses for Linux, Python, and networking.

Free courses on Linux, Python, routing, hypervisors, and the tools you actually open at work.

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Courses

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Web · Beginner

Apache HTTP Server course

Install Apache, read the config layout on Debian/Ubuntu and Windows, and put a virtual host on the network without guessing.

25 lessons Reference · Beginner

APIs: Concepts, Design, Requests, Responses, and Integration

Learn what APIs are, how HTTP requests and responses work, REST design, authentication, errors, testing, security, versioning, and API integration.

20 lessons Voice · Intermediate

Asterisk course

Install Asterisk, register a SIP endpoint, and write a dialplan that rings a phone.

29 lessons Networking · Intermediate

CCNA online course

Routing, switching, and IPv4 fundamentals aimed at lab work and the current CCNA blueprint — written as explanations you can verify on a switch, not as a dump of exam dumps.

153 lessons Networking · Intermediate

CCNA Security online course

Device hardening, AAA, filtering, and site-to-site VPN ideas that still matter on IOS-XE, even though the old IINS exam numbers are retired.

35 lessons Reference · Beginner

Display Information About USB Devices on Linux with lsusb

Learn how to use lsusb on Linux to list USB devices, inspect descriptors, understand vendor and product IDs, and view USB controller and hub topology.

1 lessons Reference · Beginner

GraphQL: Querying, Mutations, Schemas, and API Design

Learn GraphQL queries, variables, mutations, schemas, resolvers, subscriptions, pagination, security, testing, and GraphQL versus REST.

1 lessons Reference · Beginner

IT Course Directory: VMware, Linux, Networking, and Raspberry Pi

Browse four online technology courses covering VMware VCP-DCV5, Linux, CCENT ICND1 100-101, and Raspberry Pi. Compare cost, goals, ratings, and course fit.

27 lessons

Guides

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Apache Configuration Files on Ubuntu Learn where Apache configuration files are located on Ubuntu, including apache2.conf, modules, listeners, snippets, Virtual Hosts, and enabled directories. How to Find the Full Path of a Command in Linux Learn how which, which -a, PATH, type, and command -v help you find Linux command executables and understand shell command resolution. Add Python to PATH on Windows Learn how to add the folder containing python.exe to the Windows PATH variable, then verify Python from Command Prompt. What are functions? Name a block of work, pass arguments, and return a result you can test.