Git & GitHub: A Simple Guide

Git is a version control system used by developers to track changes in code. GitHub is a platform that hosts Git repositories online, making it easier to share code and collaborate with others.

Whether you are a student, a developer, or someone learning programming, understanding Git and GitHub is essential. In this guide, we’ll explain the key concepts and commands in simple terms.

1. Git Repository (Repo)

A repository is where your project files and history are stored. Every project you create or contribute to will have a repository.

Steps to create a repo on GitHub:

• Log in to GitHub and click New Repository.
• Give it a name, for example, my-first-project.
• Add a description if needed.
• Choose Public to allow others to see it or Private to keep it personal.
• Click Create Repository.

Clone a repo to your local machine:

git clone https://github.com/username/repo-name.git

2. Git Commit

A commit is like a snapshot of your project at a particular point in time. It helps you track changes.

Commands:

• Stage changes:

  git add filename

• Commit changes:

  git commit -m "Added a new feature"

3. Branching in Git

Branches allow you to work on different features without affecting the main project.

Commands:

• Create a branch:

  git branch feature-branch

• Switch to a branch:

  git checkout feature-branch

4. Git Merge

Merging brings changes from one branch into another. For example, when a feature is ready, you merge it into the main branch.

Merge a branch:

git checkout main

git merge feature-branch

Tip: If there are conflicts, Git will ask you to resolve them manually before completing the merge.

5. Pull and Push

To synchronize your local repo with GitHub:

• Pull changes from GitHub:

  git pull origin main

• Push local commits to GitHub:

  git push origin main

6. Forking and Pull Requests

• Forking: Makes your own copy of someone else’s repository so you can make changes.
• Pull Request: After making changes in your fork, you can request the original repo owner to merge your changes.

7. Benefits of Git and GitHub

• Tracks every change in your project
• Helps collaborate with multiple developers
• Acts as a backup for your code
• Lets you contribute to open-source projects