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Introduction to Version Control & Git

 

📌 Introduction to Version Control & Git

Version control is an essential tool for DevOps that helps track and manage changes in software code. It allows teams to collaborate efficiently, maintain a history of changes, and revert to previous versions if needed.



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🔹 What is Version Control?

Version Control is a system that records changes to files over time. It enables multiple developers to work on the same project without overwriting each other's code.


🔹 Types of Version Control Systems (VCS)

1️⃣ Local Version Control

  • Maintains version history on a local machine.
  • Example: Backing up files manually or using tools like RCS (Revision Control System).

2️⃣ Centralized Version Control (CVCS)

  • A single central server stores all versions of the project.
  • Developers must be connected to the server to access the latest version.
  • Examples: SVN (Subversion), Perforce, TFS (Team Foundation Server).

3️⃣ Distributed Version Control (DVCS)

  • Each developer has a full copy of the project’s history.
  • Developers can work offline and push/pull changes when needed.
  • Examples: Git, Mercurial, BitKeeper.


🔹 Why Git is the Best Choice for DevOps?

✅ Speed & Performance – Git is faster compared to centralized systems.
✅ Distributed System – Every developer has a full repository copy, reducing dependency on a central server.
✅ Branching & Merging – Git’s lightweight branches make it easy to experiment without breaking the main project.
✅ Security & Integrity – Git uses cryptographic hashing (SHA-1) to ensure data integrity.
✅ Integration with DevOps Tools – Works seamlessly with CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD).





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