SSH keys and Personal Access Tokens are the two primary authentication methods for connecting to GitHub programmatically. An SSH key is an ed25519 key pair: the private key stays on your machine, the public key lives on GitHub, and git uses the private key to verify your identity on every push and pull. A PAT, or Personal Access Token, is a scoped credential you generate on GitHub that substitutes for your password in API calls and HTTPS git operations.
The original article walks through the exact terminal commands to generate and register an SSH key: 'ssh-keygen -t ed25519 -C YOUREMAIL@DOMAIN.COM' to create the pair, 'ssh-add ~/.ssh/id_ed25519' to load it into ssh-agent, and 'cat ~/.ssh/id_ed25519.pub' to extract the public key for pasting into GitHub Settings under SSH and GPG Keys. The step-by-step is precise and covers the passphrase setup that most quick-start guides skip.
This is the final episode of GitHub's beginner series, which means it addresses the friction points that trip people up after the basics are clear. If you have ever gotten a permission denied error on a push or fumbled through token scopes, the full article covers both auth methods with the specific UI paths and commands you need, not just the concepts.
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