Distributed vs centralized version control in Git - CLI Comparison

Introduction

Version control helps you save and track changes to your files. Centralized version control stores all files in one main place, while distributed version control keeps full copies on each computer. This difference changes how teams work together and share code.

When you want a simple setup where everyone works directly on one main server and sees the latest files immediately.

When you want to work offline and still have full access to all file history and changes on your own computer.

When you want to share code easily with others without needing constant connection to a central server.

When you want to keep a backup of the entire project history on every team member's computer.

When you want to experiment with changes safely on your own copy before sharing them with the team.

Commands

This command creates a new distributed Git repository on your local computer, allowing you to track changes independently.

Terminal

git init

Expected Output

Initialized empty Git repository in /home/user/my-project/.git/

This command copies a full Git repository from a remote server to your local computer, including all history and branches.

Terminal

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

Expected Output

Cloning into 'repo'...

remote: Enumerating objects: 10, done.

remote: Counting objects: 100% (10/10), done.

remote: Compressing objects: 100% (8/8), done.

Receiving objects: 100% (10/10), done.

This command copies files from a centralized Subversion server to your local computer, but only the latest versions without full history.

Terminal

svn checkout https://svn.example.com/repo/trunk

Expected Output

Checked out revision 1234.

This command updates your local copy with the latest changes from the centralized server, requiring a connection each time.

Terminal

svn update

Expected Output

Updating '.':

At revision 1235.

Key Concept

If you remember nothing else, remember: distributed version control keeps full project history on every computer, while centralized version control relies on one main server for all history.

Common Mistakes

Trying to work offline with a centralized version control system like SVN.

Centralized systems require a connection to the main server to access history and commit changes.

Use a distributed system like Git if you need to work offline with full history.

Assuming cloning a Git repository only copies the latest files.

Git clone copies the entire history, not just the latest files, which is different from centralized checkout.

Understand that Git clone gives you the full project history locally.

Summary

Centralized version control stores all history on one main server and requires connection to work.

Distributed version control copies the full project history to each computer, allowing offline work.

Git is a popular distributed system; SVN is a common centralized system.

Commands like 'git clone' copy full history, while 'svn checkout' copies only the latest files.