git

**Git** is **the standard distributed version control system** — used by 95% of developers to track changes in source code, enabling multiple people to work on the same project simultaneously without overwriting each other's work, making collaborative software development safe and organized. **What Is Git?** - **Definition**: Distributed version control system (DVCS) - **Creator**: Linus Torvalds (2005) for Linux kernel development - **Adoption**: Industry standard, 95%+ of developers use it - **Architecture**: Every developer has full repository history locally **Why Git Matters** - **Collaboration**: Multiple developers work simultaneously - **History**: Complete record of every change ever made - **Branching**: Experiment without affecting main code - **Backup**: Distributed copies protect against data loss - **Industry Standard**: Required skill for professional development **Core Concepts**: The Three States (Working Directory, Staging Area, Repository), Branching Model (main, feature branches) **Essential Commands**: git init, git clone, git add, git commit, git pull, git push, git log **Advanced**: Rebase vs Merge, Undo Mistakes (reset, revert), .gitignore patterns **Workflows**: Git Flow, GitHub Flow (most common), Trunk Based Development **Git vs GitHub**: Git (local tool) vs GitHub (cloud hosting service) **Best Practices**: Commit Often, Clear Messages, Branch Strategy, Pull Before Push, Review .gitignore Git is **a time machine for your code** — enabling collaboration, experimentation, and safety through comprehensive version control, making it an essential tool for every developer regardless of team size or project complexity.