# Set up the hello-world repository git init -q cat > index.html << 'EOF' <!DOCTYPE html> <html> <head> <title>Hello World!</title> <link rel="stylesheet" href="bluestyle.css"> </head> <body> <h1>Hello world!</h1> <p>This is the first file in my new Git Repo.</p> <p>A new line in our file!</p> </body> </html> EOF echo "# hello-world" > README.md echo "body {background-color: lightblue;}" > bluestyle.css git add --all git commit -q -m "First release of Hello World!" # On the new branch, add an image (an empty file stands in for it) and a line in index.html git checkout -q -b hello-world-images touch img_hello_world.jpg sed -i '/<h1>/a <div><img src="img_hello_world.jpg" alt="Hello World from Space"></div>' index.html git add --all git commit -q -m "Added image to Hello World" # Go back to main git checkout -q main # Make an emergency fix on a new branch git checkout -q -b emergency-fix sed -i 's/A new line in our file!/This line is here to show how merging works./' index.html git add index.html git commit -m "updated index.html with emergency fix"