🧠 Git Cheatsheet

1. What is Git?

• Git is a version control system.
• It tracks code changes and helps collaborate.
• Allows you to revert to previous versions of your code.

2. Git vs GitHub

• Git: Local tool to track changes.
• GitHub: Online platform to host and share Git repositories.

3. Installation & Configuration

git config --global user.name "Your Name"
git config --global user.email "you@example.com"

4. Basic Git Commands

Command	Description
git init	Initialize a Git repository
git status	Show changes in your repo
git add file.txt	Stage a file
git commit -m "message"	Save a snapshot
git log	Show commit history
git clone <url>	Copy a remote repo locally
git pull	Fetch and merge changes from remote
git push	Upload local changes to remote

5. The Git Workflow

```bash
git add .
git commit -m "your message"
git push origin main

6. Branching & Merging

git branch new-feature
git checkout new-feature
git merge main

• Branches allow you to test features safely.
• Merge changes back into the main branch.

7. .gitignore

Use .gitignore to exclude files from being tracked.

*.log
__pycache__/
.env

8. Undoing Changes

git checkout -- file.txt      # Discard local changes
git reset HEAD file.txt       # Unstage a file
git revert <commit_hash>      # Revert a commit

9. Working with GitHub

• Create a GitHub repo.
• Clone the repo:

git clone https://github.com/user/repo.git

• Make changes → commit → push:

git push origin main

• Open Pull Requests, use Issues to track tasks.

🛠️ Practice Ideas

• Create a repo and make commits.
• Create and merge branches.
• Collaborate with a teammate using GitHub.

🧩 Bonus Concepts

• git stash: Save changes temporarily.
• git rebase: Rewrite commit history.
• Git GUIs: VS Code Git Panel.