# freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More Browse thousands of programming tutorials written by experts. Learn Web Development, Data Science, DevOps, Security, and get developer career advice. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Learn How to Deploy, Secure, and Automate Full-Stack Web Apps DevFeed: [Learn How to Deploy, Secure, and Automate Full-Stack Web Apps]() Original publisher: [Read original article]() Author: Beau Carnes Published: 2026-09-16T15:28:18Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [web applications](), [Deployment](), [CI/CD](), [FastAPI](), [GitHub Actions](), [Vue.js](), [nginx](), [firewalls](), [Python](), [Cloudflare](), [SSL](), [Ubuntu]() Tags: [analysis](), [authentication](), [ci-cd](), [deploy](), [fastapi](), [full-stack](), [github-actions](), [how-to](), [web](), [web-apps](), [youtube]() ### AI overview This article introduces an 11-hour freeCodeCamp course on deploying, securing, and automating a Vue.js and FastAPI web application. It covers Ubuntu server setup, SSH hardening, firewalls, application runtimes, Meilisearch, DNS, SSL, Nginx, Cloudflare, GitHub Actions, security testing, and observability. ### Source excerpt Taking a web application from local development to a live, secure production environment can be daunting if you've never looked under the hood. We just published a comprehensive course on the freeCode ## How to Write a Linux Kernel Module That Actually Builds DevFeed: [How to Write a Linux Kernel Module That Actually Builds]() Original publisher: [Read original article]() Author: Chris Roy Published: 2026-09-15T21:10:57Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Kernel](), [Linux](), [modules](), [Compiler](), [Secure Boot]() Tags: [compiler](), [kernel](), [linux](), [linux-kernel](), [module](), [secure-boot](), [tutorial]() ### AI overview This tutorial explains how to build and load a Linux kernel module, including the generated object files, metadata, symbols, debug information, required kernel headers and compiler setup, and common Secure Boot and kernel lockdown restrictions. ### Source excerpt A Linux kernel module is a small piece of code that can be loaded into the running kernel without rebuilding the entire kernel. That sounds simple enough, but even a minimal module produces a surprisi ## The 7 Essential Parts of Your Online Presence DevFeed: [The 7 Essential Parts of Your Online Presence]() Original publisher: [Read original article]() Author: Manish Shivanandhan Published: 2026-09-15T21:07:31Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Website]() Tags: [job-search](), [linkedin](), [open-source](), [personal](), [portfolio](), [profile](), [social-media](), [work]() ### AI overview This article explains seven parts of a strong online presence, beginning with a professional profile and personal website. It emphasizes consistency, clear descriptions of problems solved and outcomes achieved, and using a personal website to present work, case studies, and contact information. ### Source excerpt Your online presence often gives potential employers, clients, partners, and recruiters their first impression of you. It's likely what they see before they ever meet you. They search your name, read ## How to Build an Endpoint Data Loss Prevention Strategy for Your Development Team DevFeed: [How to Build an Endpoint Data Loss Prevention Strategy for Your Development Team]() Original publisher: [Read original article]() Author: Alex Tray Published: 2026-09-15T21:03:09Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [data loss prevention](), [Development](), [Access Control](), [data]() Tags: [access-control](), [cybersecurity](), [cybersecurityawareness](), [data-loss-prevention](), [data-protection](), [database](), [development](), [encryption](), [endpoint-security](), [hardcoded-credentials](), [it-security](), [net-conf](), [remote-access](), [secrets](), [sensitive-data](), [web-development]() ### AI overview A tutorial for development teams on building endpoint data loss prevention strategies. It covers auditing laptops for secrets and sensitive data, removing unnecessary copies, rotating exposed credentials, and establishing access controls. ### Source excerpt A developer's laptop holds more sensitive data than most people realize: API keys, database credentials, staging environment secrets, and sometimes entire copies of production data pulled down "just f ## What's New in macOS 27 for Developers? DevFeed: [What's New in macOS 27 for Developers?]() Original publisher: [Read original article]() Author: Daniel Kehoe Published: 2026-09-15T21:01:18Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [macOS](), [upgrade](), [Development]() Tags: [apple](), [beginner-developers](), [developer](), [developers](), [development](), [installation](), [intel](), [macos](), [upgrade]() ### AI overview This guide explains what macOS 27 changes for developers, which Macs can upgrade, and how to reduce upgrade time. It states that macOS 27 requires Apple Silicon, recommends waiting for macOS 27.1 on work-critical Macs, and compares Software Update with Apple's package installer. ### Source excerpt macOS 27 Golden Gate is here. Apple released it September 14, 2026, as a free upgrade for every Mac that can run it. I'll show you what actually changes for developers in macOS 27, how to upgrade with ## How WebRTC Scales: Signaling, NAT Traversal, and the Mesh/SFU/MCU Tradeoff DevFeed: [How WebRTC Scales: Signaling, NAT Traversal, and the Mesh/SFU/MCU Tradeoff]() Original publisher: [Read original article]() Author: Karan Pratap Singh Published: 2026-09-15T15:57:39Z Content type: article Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [WebRTC](), [real-time](), [browsers](), [API](), [JavaScript](), [WebSocket](), [Firewall](), [Network](), [servers]() Tags: [api](), [browsers](), [decoding](), [distributed-system](), [firewall](), [http](), [javascript](), [network](), [networking](), [real-time](), [server](), [webrtc]() ### AI overview This article explains how WebRTC enables browsers to exchange audio, video, and data directly. It covers the three WebRTC APIs, signaling through WebSockets or HTTP, NAT traversal using ICE, STUN, and TURN, and the mesh, SFU, and MCU approaches to scaling media delivery. ### Source excerpt Web Real-Time Communication (or WebRTC) is the open standard browsers use to send audio, video, and data straight to each other. There's no plugin or native app, nothing beyond an API that every brows ## How to Catch Security Vulnerabilities in Code Before They Reach Your Pull Requests DevFeed: [How to Catch Security Vulnerabilities in Code Before They Reach Your Pull Requests]() Original publisher: [Read original article]() Author: Umair Mirza Published: 2026-09-14T22:23:01Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Application Security](), [Security](), [Vulnerabilities](), [Secret Scanning](), [Git](), [pull-requests](), [ci](), [Command-line interface](), [.NET](), [Python](), [coding]() Tags: [application-security](), [ci](), [cli](), [code](), [devsecops](), [git](), [net](), [pull-requests](), [python](), [sast](), [secret-scanning](), [security](), [security-vulnerabilities](), [software-development](), [testing](), [vulnerabilities]() ### AI overview This tutorial explains how to shift security checks earlier in development by running SAST locally with Git pre-commit hooks. It demonstrates using the DevSkim CLI to detect insecure coding patterns, pairing it with Gitleaks for dedicated secret scanning, validating the setup with an intentional failure, and enforcing the checks in CI. ### Source excerpt Security reviews are most effective when developers receive feedback while the code is still fresh in their minds. Waiting until a pull request, CI build, or penetration test to find exposed credentia ## How to Use Differential Testing During a Legacy Migration DevFeed: [How to Use Differential Testing During a Legacy Migration]() Original publisher: [Read original article]() Author: Hugo Teijiz Published: 2026-09-14T16:25:50Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [migration](), [Testing](), [TypeScript](), [Integration testing](), [API](), [observability](), [Artificial Intelligence]() Tags: [ai](), [api](), [architecture](), [artificial-intelligence](), [code](), [how-to](), [integration](), [legacy-code](), [legacy-modernization](), [migration](), [modernization](), [observability](), [software-architecture](), [software-testing](), [testing](), [tests](), [tutorial](), [typescript]() ### AI overview This tutorial explains how to use differential testing during a legacy migration by running old and new implementations with identical inputs and comparing their behavior. It covers equivalence rules, output normalization, nondeterministic values, errors, side effects, automated testing, mismatch analysis, production shadow traffic, and using AI to classify divergences without allowing it to determine correctness. ### Source excerpt The most dangerous moment in a legacy migration isn't necessarily when you start writing the new implementation. It's when the new implementation looks finished. The code compiles, the tests pass, the ## How to Implement Feature Flags for Safe and Gradual Rollouts DevFeed: [How to Implement Feature Flags for Safe and Gradual Rollouts]() Original publisher: [Read original article]() Author: Abisoye Alli-Balogun Published: 2026-09-14T14:58:55Z Content type: article Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [feature flags](), [CI/CD](), [Deployment](), [Development](), [Tech Debt](), [Testing]() Tags: [architecture](), [best-practices](), [ci-cd](), [deployment](), [development](), [experimentation](), [feature-flags](), [how-to](), [tech-debt](), [testing]() ### AI overview This article explains how to implement feature flags for safe, gradual rollouts. It covers separating deployment from release, boolean toggles, percentage-based rollouts, user segmentation, experimentation, kill switches, lifecycle management, and common anti-patterns. ### Source excerpt Feature flags are one of the most powerful tools in a team's deployment arsenal. They decouple deployment from release, meaning your CI/CD pipeline can push code to production servers on every merge, ## How to Design Gifting Features People Actually Use: Evidence from 58 Apps DevFeed: [How to Design Gifting Features People Actually Use: Evidence from 58 Apps]() Original publisher: [Read original article]() Author: Anamol Rajbhandari Published: 2026-09-14T13:58:38Z Content type: article Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [App](), [SQL]() Tags: [apps](), [article](), [design](), [developer](), [ecommerce](), [research](), [sql](), [ux]() ### AI overview The article examines whether gifting features are worth building into consumer apps. Drawing on research across 58 apps, it identifies gifting scenarios, the triggers that prompt people to send gifts, and the costs and design work involved in implementing them. ### Source excerpt American shoppers spent about $29 billion on gift cards over the 2025 holiday season, and 43 percent of them bought at least one. This put gift cards at the top of what people said they wanted accordi ## How to Connect to HMRC's Making Tax Digital API: A Beginner's Guide DevFeed: [How to Connect to HMRC's Making Tax Digital API: A Beginner's Guide]() Original publisher: [Read original article]() Author: Solomon Amos Published: 2026-09-11T22:10:33Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [API](), [Security, Privacy and Abuse Prevention]() Tags: [api](), [apis](), [code](), [guide](), [hmrc](), [hmrc-tax-filing](), [hmrc-tax-returns](), [how-to](), [integration](), [mtd](), [node](), [oauth](), [tax](), [tax-return](), [typescript]() ### AI overview A beginner-friendly guide to connecting software to HMRC's Making Tax Digital API. It explains the MTD context, sandbox setup, OAuth 2.0 authentication, fraud prevention headers, and authenticated API calls using Node and TypeScript. ### Source excerpt If you write software for anyone who pays UK tax, sooner or later you'll need to talk to HMRC. Making Tax Digital (MTD) for Income Tax went live on 6 April 2026, and it's already mandatory for self-em ## How to Prevent Race Conditions in Django DevFeed: [How to Prevent Race Conditions in Django]() Original publisher: [Read original article]() Author: Mari Published: 2026-09-11T21:50:46Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Concurrency](), [Database](), [SQLite](), [Docker]() Tags: [backend](), [concurrency](), [database](), [django](), [how-to](), [postgresql](), [python](), [race-condition](), [sqlite](), [transactions]() ### AI overview A Django tutorial that demonstrates a credit-spending race condition and explains how database transactions and row locks prevent concurrent requests from using the same credit. ### Source excerpt Let's say you have enough credit left to generate one more image in an AI app. You submit a request in one browser tab, then submit another in a second tab before the first finishes. The app accepts b ## How to Sandbox a Linux Process with Landlock, No Root Required DevFeed: [How to Sandbox a Linux Process with Landlock, No Root Required]() Original publisher: [Read original article]() Author: Chris Roy Published: 2026-09-11T21:42:27Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Processes]() Tags: [c](), [gcc](), [how-to](), [kernel](), [linux](), [process](), [sandbox](), [security](), [selinux](), [ubuntu]() ### AI overview A hands-on guide to sandboxing a Linux process with Landlock without root privileges. It explains the kernel feature, prerequisites, its self-restriction model, and the system calls used to define and apply filesystem-access rules. ### Source excerpt Here's a program restricting itself, then trying to read two files: without landlock: read /etc/hostname ok read /tmp/secret.txt ok with landlock, /etc allowed: read ## How to Build an AI Chat App Interface With the Vercel AI SDK and Shadcn/ui DevFeed: [How to Build an AI Chat App Interface With the Vercel AI SDK and Shadcn/ui]() Original publisher: [Read original article]() Author: Vaibhav Gupta Published: 2026-09-11T16:21:29Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [vercel ai sdk](), [AI Chat](), [SDKs](), [Node.js]() Tags: [ai](), [app](), [how-to](), [llm](), [mcp](), [next-js](), [node](), [openai](), [react](), [shadcn-ai-chat-app](), [shadcn-ui](), [streaming](), [tailwind](), [typescript](), [ui](), [vercel](), [vercel-ai-sdk]() ### AI overview Tutorial for building a streaming AI chat interface in Next.js with the Vercel AI SDK and shadcn/ui. ### Source excerpt Every other AI product you open today has the same screen: a message list, a text box at the bottom, and words that stream in one token at a time. It looks simple, but it's not simple to build well. Y ## How to Build a Self-Evaluating AI System: Automated Testing and Evaluation Pipelines for LLM Applications DevFeed: [How to Build a Self-Evaluating AI System: Automated Testing and Evaluation Pipelines for LLM Applications]() Original publisher: [Read original article]() Author: Jude Otine Published: 2026-09-11T15:24:04Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [LLM evaluation / benchmarking](), [Large Language Model](), [Software Engineering]() Tags: [ai](), [ai-agents](), [artificial-intelligence](), [evaluation](), [how-to](), [llm](), [machine-learning](), [python](), [software-testing](), [testing]() ### AI overview A tutorial on building automated evaluation pipelines for LLM applications, focusing on why conventional deterministic tests are inadequate for variable model outputs. ### Source excerpt So you shipped your AI feature and it works in demos. Your team is impressed. Then a user asks a question slightly outside your test cases and the model confidently returns something completely wrong. ## How AI Is Changing Malware Detection: From Traditional Antivirus to Next-Gen Protection DevFeed: [How AI Is Changing Malware Detection: From Traditional Antivirus to Next-Gen Protection]() Original publisher: [Read original article]() Author: Manish Shivanandhan Published: 2026-09-11T15:22:46Z Content type: article Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Malware](), [Machine learning](), [ransomware](), [cloud-infrastructure](), [PowerShell](), [Microsoft]() Tags: [ai](), [ai-agents](), [attacks](), [cloud](), [machine-learning](), [malware](), [microsoft](), [powershell](), [ransomware](), [security]() ### AI overview An overview of how malware detection is shifting beyond signature-based antivirus toward machine learning, behaviour tracking, and cloud threat data. It also describes how malware evades traditional detection and notes limitations of AI-based approaches. ### Source excerpt Malware used to be simple to describe. A virus attached itself to a file, and antivirus software removed it. That world is gone. Today, a single attack can steal your passwords, lock up your photos, w ## How to Implement LEGO Architecture in Flutter \[Full Handbook\] DevFeed: [How to Implement LEGO Architecture in Flutter \[Full Handbook\]]() Original publisher: [Read original article]() Author: Atuoha Anthony Published: 2026-09-11T15:08:19Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [Code](), [Dart](), [App]() Tags: [architecture](), [dart](), [dependency-injection](), [flutter](), [flutter-aware](), [handbook](), [how-to]() ### AI overview A Flutter handbook that introduces LEGO Architecture: building code from independently connected pieces. It also relates this approach to Clean Architecture and covers Dart contracts and dependency injection. ### Source excerpt Almost everyone has snapped two LEGO bricks together at some point, even without owning a single set as an adult. You press one brick down onto another, feel it click, and it holds. You likely never o ## What Is an Agent Harness? The Architecture Behind Claude Code, DeepSeek Harness, and Hermes Agent DevFeed: [What Is an Agent Harness? The Architecture Behind Claude Code, DeepSeek Harness, and Hermes Agent]() Original publisher: [Read original article]() Author: Rudrendu Paul Published: 2026-09-11T15:07:18Z Content type: tutorial Language: en Sources: [freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More]() Topics: [AI Bots](), [AI-assisted coding]() Tags: [agent](), [ai-agents](), [architecture](), [artificial-intelligence](), [claude-code](), [deepseek](), [developer-tools](), [llm](), [machine-learning](), [mcp](), [memory](), [python](), [sandbox](), [software-engineering](), [tools]() ### AI overview An explainer and hands-on guide to agent harnesses: the runtime infrastructure around an LLM that manages model calls, tool execution, memory, and filesystem sandboxing. It compares popular harnesses and introduces a small Python implementation. ### Source excerpt On August 13, 2026, DeepSeek published a GitHub repository called deepseek-harness. Within two days, it had passed 95,386 stars and 8,826 forks (a vanity metric on its own, but a spike this fast signa