Why knowing how to undo matters in Git - See It in Action

Why Knowing How to Undo Matters in Git

📖 Scenario: You are working on a project using Git to manage your code. Sometimes, mistakes happen, like adding wrong files or making unwanted changes. Knowing how to undo these mistakes quickly helps keep your project clean and saves time.

🎯 Goal: Learn how to undo changes in Git using basic commands to reset files and commits safely.

📋 What You'll Learn

Create a new Git repository

Add a file with initial content

Make a change and stage it

Undo the staged change

Make a commit and undo the last commit

💡 Why This Matters

🌍 Real World

In real projects, mistakes happen often. Knowing how to undo changes in Git helps you fix errors without losing your work or breaking the project.

💼 Career

Developers and DevOps engineers use Git daily. Mastering undo commands is essential for safe and efficient code management.

1

Initialize a Git repository and add a file

Run git init to create a new Git repository. Then create a file named notes.txt with the content Hello Git. Finally, add the file to Git using git add notes.txt.

Git

# Run git init
# Create notes.txt with content 'Hello Git'
# Run git add notes.txt

Need a hint?

Use git init to start a repo. Use echo to create the file. Use git add to stage it.

2

Make a change and stage it

Change the content of notes.txt to Hello Git Undo using echo. Then stage the change with git add notes.txt.

Git

git init

echo "Hello Git" > notes.txt

git add notes.txt

# Change notes.txt content to 'Hello Git Undo'
# Stage the changed file

Need a hint?

Overwrite the file with new content using echo. Then stage it again.

3

Undo the staged change

Use git restore --staged notes.txt to unstage the change you just added.

Git

git init

echo "Hello Git" > notes.txt

git add notes.txt

echo "Hello Git Undo" > notes.txt

git add notes.txt

# Unstage the change to notes.txt

Need a hint?

Use git restore --staged to remove a file from the staging area.

4

Make a commit and undo the last commit

Commit the current staged files with git commit -m "Initial commit". Then undo the last commit but keep the changes using git reset --soft HEAD~1. Finally, print the current Git status with git status.

Git

git init

echo "Hello Git" > notes.txt

git add notes.txt

echo "Hello Git Undo" > notes.txt

git add notes.txt

git restore --staged notes.txt

# Commit staged files with message "Initial commit"
# Undo the last commit but keep changes
# Show git status

Need a hint?

Use git commit -m to commit. Use git reset --soft HEAD~1 to undo the commit but keep changes staged. Use git status to see the current state.