Git & GitHub

First practical step: install Git and set your identity so every commit is attributed correctly.

This is Git's beating heart: edit, stage, snapshot — you'll repeat it thousands of times.

Git's real value is going back to any moment and seeing who changed what and why.

Mistakes happen — Git gives you a safety net to undo instead of losing work.

Branches let you build a new feature without breaking the stable main code.

When combining two branches, you must merge them and resolve conflicts with confidence.

This is where your code leaves your machine to the cloud for collaboration and backup.

The PR is the heart of GitHub collaboration — how teams review code before it merges.

Large teams need an agreed system for branches and releases, or chaos ensues.

Powerful tools clean your history and rescue you from mistakes — but use them carefully.

When you think a commit is lost forever, Git usually still has it — if you know where to look.

GitHub Actions runs your tests and deploys automatically on every push, hands-free.