Development

Complete guide to localhost:4891 - the default port for the GPT4All local API server.

Complete guide to localhost:11434 - the default port for Ollama, the popular open-source tool for running local LLMs.

The CLI coding agents worth using in 2026: Claude Code on Opus 4.8, OpenAI Codex on GPT-5.5, OpenCode's growth to 165k+ stars after its Anthropic login dispute, Cursor CLI's pending $60B SpaceX acquisition, Antigravity CLI after the Gemini CLI shutdown, and where Aider and the open-source Pi harness still fit.

Master SSH port forwarding with practical examples for local, remote, and dynamic tunneling. Learn how to securely access databases, bypass firewalls, and debug applications.

Understand `127.0.0.1`, loopback addresses, and how they work in networking. Learn why localhost points to `127.0.0.1` and how to use loopback for development and testing.

Discover the best AI coding tools in 2026. Compare GitHub Copilot, Cursor, Windsurf, Claude Code, and open-source alternatives. Find the perfect AI assistant for your development workflow.

Complete guide to localhost:8000 - the popular port used by Django, Python HTTP servers, and various development frameworks.

Complete guide to localhost:5432 - the default port for PostgreSQL database server, connections, and development workflows.

Complete guide to localhost:5173 - the default port for Vite development server used by Vue.js, React, and modern frontend frameworks.

Complete guide to localhost:4200 - the default port for Angular development server used by Angular CLI and modern frontend development.