How to Build a CI/CD Pipeline from Scratch Using GitHub Actions

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CI/CD pipelines automate code testing and deployment every time a developer pushes changes, eliminating the need for manual checks. GitHub Actions is GitHub's built-in automation tool that monitors repository events and executes predefined jobs via YAML configuration files. A beginner-friendly guide walks through creating a simple Node.js app with Jest tests, then connecting it to a GitHub repository. A workflow file placed in the .github/workflows/ directory instructs GitHub Actions to install dependencies and run tests on every push or pull request to the main branch. The setup requires no prior DevOps experience and takes roughly 15 minutes to complete.

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History Shows We Built Civilizations on Incomplete Science. AI Is Next.

The transistor, invented at Bell Labs in 1947, was built on quantum mechanics that its creators did not fully understand at a theoretical level, yet it became the foundation of modern computing. Two decades earlier, Einstein, Bohr, and Heisenberg debated the meaning of quantum reality at the 1927 Solvay Conference without reaching consensus — a debate that remains unresolved today. A similar pattern is now unfolding with artificial intelligence, where philosophical questions about consciousness, bias, and hallucination remain open while builders continue to deploy the technology. The article argues that uncertainty has historically been the condition under which transformative technologies were built, not a reason to delay. It contends that 2025-2026 marks an unprecedented moment where individual developers can access AI capabilities once exclusive to large institutions, drawing a parallel to the leverage that Bell Labs engineers had over conference-room theorists.

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ProgrammingDEV Community ·

How to Migrate from node_exporter to Grafana Alloy Without Downtime

Grafana Alloy is a unified telemetry agent that consolidates the roles of node_exporter, log shippers, and other monitoring tools into a single component with one configuration and upgrade cycle. Unlike node_exporter, which exposes a port and waits for Prometheus to scrape metrics, Alloy pushes metrics outbound via Prometheus Remote Write, eliminating the need for open inbound firewall rules or scrape network routing. The recommended migration approach is gradual: install Alloy alongside the existing node_exporter, configure its built-in prometheus.exporter.unix component, and verify metrics are flowing to the remote Prometheus instance before decommissioning node_exporter. Alloy uses a pipeline-style configuration language called River, where discrete components are chained together to collect, scrape, and forward telemetry data. The author validated this step-by-step process on a production fleet called the Irin monitoring stack, routing outbound metrics securely through a Cloudflare Tunnel.

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ProgrammingDEV Community ·

Terminal vs. Shell Explained: A Developer's Guide to CLI Fundamentals

A tutorial published on DEV Community breaks down the distinction between terminal emulators and shell interpreters for developers learning command-line fundamentals. Terminal applications such as Windows Terminal serve as visual wrappers that render text and manage tabs, while shells like PowerShell, CMD, and Bash act as the underlying command interpreters that communicate with the OS kernel. The guide highlights a key difference between CMD and PowerShell: CMD outputs plain text requiring manual string parsing, whereas PowerShell pipelines structured objects with queryable properties. It also covers file system concepts including absolute and relative paths, and hidden dotfiles such as .env and .gitignore that are concealed from standard directory views by default. Essential CLI utilities like pwd and ls are introduced as foundational tools for navigating and manipulating the file system without a graphical interface.

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ProgrammingDEV Community ·

AI Will Not Replace Teachers but Is Reshaping How Students Learn Independently

Artificial intelligence is increasingly being integrated into education, though experts argue it cannot replicate the deeply human qualities that effective teachers bring to the classroom. A key area where AI is making an impact is independent study, where students traditionally struggle with inefficient self-study methods and passive reading. Modern AI educational tools can now explain concepts at a student's level, generate personalized practice quizzes, and even analyze a student's own notes, slides, and textbooks. In mathematics, AI is shifting focus from simply providing answers to walking students through step-by-step reasoning, promoting conceptual understanding. Educational research supports this direction, as active recall techniques like AI-generated quizzes are proven to strengthen long-term retention more effectively than rereading material.

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