Why version control matters in Git - See It in Action

Why Version Control Matters

📖 Scenario: You are working on a simple text file project with a friend. You want to keep track of changes so you can see what was added or fixed and avoid losing work.

🎯 Goal: Learn how to create a git repository, add a file, commit changes, and see the history of changes to understand why version control is important.

📋 What You'll Learn

Create a new git repository

Add a file named notes.txt with initial content

Commit the file with a message

Make a change to notes.txt and commit again

View the commit history

💡 Why This Matters

🌍 Real World

Version control is used by developers to keep track of changes in code and documents. It helps teams work together without overwriting each other's work.

💼 Career

Knowing git is essential for software development, DevOps, and many IT roles. It shows you can manage projects safely and collaborate with others.

1

Initialize a Git Repository and Create a File

Run the command git init to create a new git repository. Then create a file named notes.txt with the exact content Hello, this is my first note.

Git

# Run 'git init' to start a new repository
# Create 'notes.txt' with the text 'Hello, this is my first note.'

Need a hint?

Use git init to start version control in your folder. Use echo to create the file with the exact text.

2

Add the File to Git and Commit

Use git add notes.txt to stage the file. Then commit it with the message Initial commit with notes.txt using git commit -m.

Git

git init

echo "Hello, this is my first note." > notes.txt
# Add 'notes.txt' to git and commit with message 'Initial commit with notes.txt'

Need a hint?

Use git add to tell git which files to track. Use git commit -m "message" to save a snapshot with a message.

3

Modify the File and Commit the Change

Add the line This is an added line. to notes.txt. Then stage and commit this change with the message Added a new line to notes.txt.

Git

git init

echo "Hello, this is my first note." > notes.txt

git add notes.txt

git commit -m "Initial commit with notes.txt"
# Add a new line to 'notes.txt' and commit with message 'Added a new line to notes.txt'

Need a hint?

Use >> to append a line to the file. Then add and commit the change with a clear message.

4

View the Commit History

Run the command git log --oneline to see the list of commits with their messages.

Git

git init

echo "Hello, this is my first note." > notes.txt

git add notes.txt

git commit -m "Initial commit with notes.txt"

echo "This is an added line." >> notes.txt

git add notes.txt

git commit -m "Added a new line to notes.txt"
# Run 'git log --oneline' to view commit history

Need a hint?

The git log --oneline command shows a short list of commits with their messages. You should see both commits listed.