# Git Basics Guide

A quick reference guide for using Git commands to create a repository, push code, and perform essential Git operations.

## 1. Setting Up Git
- **Install Git**: Download from [git-scm.com](https://git-scm.com/) and follow the installation instructions.
- **Configure Git**: Set up your name and email (required for commits).
  ```bash
  git config --global user.name "Your Name"
  git config --global user.email "your_email@example.com"

2. Creating a New Repository

• Create a Directory: Make a folder for your project and navigate to it.

  mkdir project-name
  cd project-name

• Initialize Git: Initialize a new Git repository in your project folder.

  git init

• Add a README (Optional): Create a README file to describe your project.

  echo "# Project Title" >> README.md
  git add README.md
  git commit -m "Add README"

3. Making Changes and Committing

• Check Status: See what changes are pending for commit.

  git status

• Add Files: Stage files to commit (use . to add all changed files).

  git add filename   # or
  git add .

• Commit Changes: Commit your changes with a message.

  git commit -m "Describe your changes"

4. Connecting to GitHub

• Create a Repository on GitHub: Go to GitHub, create a new repository, and copy its URL.
• Add Remote Origin: Link your local Git repository to the GitHub repo.

  git remote add origin <repository-URL>

5. Pushing Code to GitHub

• Push Initial Commit: Send your code to GitHub (for the first push, you may need to specify -u origin main).

  git push -u origin main

• For subsequent pushes:

  git push

6. Pulling Changes from GitHub

• Fetch Changes: Retrieve updates from the remote repository.

  git fetch origin

• Pull Changes: Update your local repository with changes from GitHub.

  git pull origin main

7. Branching Basics

• Create a New Branch: Useful for adding features or working on separate tasks.

  git branch branch-name

• Switch to a Branch:

  git checkout branch-name

• Merge a Branch: Merge a branch into the main branch after completing work.

  git checkout main
  git merge branch-name

8. Useful Commands

• Check Commit History:

  git log

• View Changes Before Committing:

  git diff

• Undo Last Commit (use carefully):

  git reset --soft HEAD~1  # Keeps changes
  git reset --hard HEAD~1  # Discards changes

9. Cloning an Existing Repository

• Clone Repository: Copy a repository from GitHub to your local machine.

  git clone <repository-URL>

Key Concepts

• Remote: Link to the GitHub repository (usually named origin).
• Staging Area: Where files are added before committing.
• Commit: Saves your changes locally with a description.
• Push/Pull: Send changes to or retrieve updates from GitHub.

This guide should help you get started with Git and GitHub!