git revert to undo a commit safely - Mini Project: Build & Apply

Undo a Commit Safely Using git revert

📖 Scenario: You are working on a project and accidentally committed a change that you want to undo without losing the history of your work.

🎯 Goal: Learn how to safely undo a commit using git revert so that the commit history remains intact and the unwanted changes are undone.

📋 What You'll Learn

Create a git repository with an initial commit

Make a second commit with a change

Use git revert to undo the second commit

Show the commit log to confirm the revert

💡 Why This Matters

🌍 Real World

In real projects, mistakes happen. Using <code>git revert</code> helps undo changes without losing history, which is important for teamwork and tracking.

💼 Career

Knowing how to safely undo commits is a key skill for developers and DevOps engineers to maintain clean and reliable project histories.

1

Initialize a Git repository and create the first commit

Run the commands to initialize a git repository, create a file named file.txt with the content Hello World, add it to git, and commit with the message Initial commit.

Git

# Your code here

Need a hint?

Use git init to start the repository. Use echo to create the file. Then add and commit.

2

Make a second commit with a change

Modify file.txt by adding the line This is a second line, then add and commit the change with the message Added second line.

Git

git init
echo "Hello World" > file.txt
git add file.txt
git commit -m "Initial commit"
# Your code here

Need a hint?

Use >> to append text to the file. Then add and commit the change.

3

Undo the second commit safely using git revert

Use git revert with the commit hash of the second commit to create a new commit that undoes the changes from the second commit.

Git

git init
echo "Hello World" > file.txt
git add file.txt
git commit -m "Initial commit"
echo "This is a second line" >> file.txt
git add file.txt
git commit -m "Added second line"
# Your code here

Need a hint?

Use git revert HEAD to undo the last commit safely.

4

Show the commit log to confirm the revert

Run git log --oneline to display the commit history and confirm that the revert commit is present.

Git

git init
echo "Hello World" > file.txt
git add file.txt
git commit -m "Initial commit"
echo "This is a second line" >> file.txt
git add file.txt
git commit -m "Added second line"
git revert HEAD
# Your code here

Need a hint?

The output should show three commits including the revert commit.