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Version Control

Git is a free, open-source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. It is the industry standard for tracking changes in source code during software development.

Key Concepts​

  • Version Control: A system that records changes to files over time, allowing you to recall specific versions later. It enables you to "turn back the clock" if mistakes are made.
  • Distributed System: Unlike centralized systems, every developer has a full, local copy of the project repository on their own computer. This allows for offline work and independent branching.
  • Snapshots: Instead of just tracking file differences, Git treats data more like a series of snapshots of a miniature filesystem. If a file has not changed, Git simply links to the previous identical file to save space.

Basic Workflow & Commands​

To start using Git, you generally follow this workflow:

  1. git init: Initializes a new Git repository in your current folder, creating a hidden .git directory that stores all tracking information.
  2. git clone [url]: Downloads an existing repository from a remote source (like GitHub or GitLab).
  3. git status: Checks the state of your files to see what has been modified, added, or is untracked.
  4. git add [file]: Moves changes to the "staging area," preparing them to be included in the next commit.
  5. git commit -m "[message]": Saves a snapshot of your staged changes to the project history with a descriptive message.
  6. git branch / git checkout: Used to create, list, or switch between "branches"—independent lines of development.
  7. git push: Uploads your local commits to a remote repository to share them with others.
  8. git pull: Fetches and integrates changes from a remote repository into your local copy.

Why Use Git?​

  • Collaboration: Multiple developers can work on the same codebase without overwriting each other's work.
  • Safety: You can experiment with new features in branches without affecting the main code, and easily recover from errors.
  • Ecosystem: Git works seamlessly with platforms like GitHub, GitLab, and Bitbucket, which provide hosting, visual interfaces, and additional project management tools.