Glossary

What Is Version Control?

Version Control System

Version control tracks changes to code over time, enabling collaboration, history, branching, and reverting. Git is the dominant version control system — used by virtually every professional developer. GitHub, GitLab, and Bitbucket host Git repositories and add collaboration features.

How Version Control Works

Without version control: final_v2_FIXED_REAL_FINAL.zip. With Git: every change is a commit with a message, author, and timestamp. Branch to work on features without affecting main. Merge when ready. Revert if something breaks. Multiple developers work on the same codebase simultaneously.

Git enables: feature branches (isolated development), pull requests (code review), CI/CD (automated testing on every push), and bisect (find the commit that introduced a bug). It's foundational to modern development.

Why Developers Use Version Control

Git proficiency is non-negotiable for developers. Learn: commit, branch, merge, pull/push, rebase, and resolving merge conflicts. GitHub is the standard platform for open-source collaboration and many companies' private repositories.

Key Concepts

  • Commits — Snapshots of changes with messages — the atomic unit of version history
  • Branches — Parallel lines of development — feature branches, release branches, hotfix branches
  • Merge/Rebase — Integrate changes from one branch into another — merge creates a merge commit, rebase replays commits
  • Pull Requests — Propose changes for review before merging — the standard code review mechanism
  • Conflict Resolution — When two branches modify the same code — manually choose which changes to keep
  • History — Complete record of every change, who made it, and when — git log, git blame, git bisect

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Frequently Asked Questions

Git vs GitHub?

Git is the version control tool (runs locally). GitHub is a platform for hosting Git repositories with collaboration features (pull requests, issues, Actions). GitLab and Bitbucket are alternatives.

Do I need to know Git for web development?

Yes. Every professional development team uses Git. It's as fundamental as knowing your programming language.

Want a structured learning path?

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Related Terms

GitCI/CDAgileMonorepoGitOps

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