How to Install OpenAI Codex CLI on Ubuntu

Codex CLI is OpenAI’s lightweight coding agent that runs directly in your terminal. It reads your codebase, executes shell commands, edits files, runs tests, debugs issues — all through natural language. Think of it as ChatGPT natively integrated into your terminal workflow. This guide covers every installation method on Ubuntu, from beginner-friendly to advanced. ...

June 29, 2026 · 5 min · Chen Shuaiming