stdout redirection (>, >>) in Linux CLI - Mini Project: Build & Apply

Redirecting Command Output to Files in Linux

📖 Scenario: You are working on a Linux system and want to save the output of commands to files. This helps you keep records or logs of what commands produce.

🎯 Goal: Learn how to redirect the output of commands to files using > to overwrite and >> to append.

📋 What You'll Learn

Use the echo command to produce output

Redirect output to a file using >

Redirect output to a file using >>

Verify the contents of the file using cat

💡 Why This Matters

🌍 Real World

Saving command outputs to files is useful for logging, record keeping, and sharing results with others.

💼 Career

Many IT and DevOps jobs require managing logs and outputs efficiently using redirection in Linux.

1

Create a file with initial content using output redirection

Use the echo command to write the text Hello World into a file named greeting.txt using the > operator.

Linux CLI

# Use echo and > to write 'Hello World' to greeting.txt
# Your code here

Need a hint?

Use echo "Hello World" > greeting.txt to create or overwrite the file.

2

Add a second line to the file using append redirection

Use the echo command to add the text Welcome to Linux to the file greeting.txt without removing the existing content. Use the >> operator.

Linux CLI

echo "Hello World" > greeting.txt
# Use echo and >> to append 'Welcome to Linux' to greeting.txt
# Your code here

Need a hint?

Use echo "Welcome to Linux" >> greeting.txt to add text without deleting existing content.

3

Overwrite the file with new content

Use the echo command to overwrite the file greeting.txt with the text Goodbye using the > operator.

Linux CLI

echo "Hello World" > greeting.txt
echo "Welcome to Linux" >> greeting.txt
# Use echo and > to overwrite greeting.txt with 'Goodbye'
# Your code here

Need a hint?

Use echo "Goodbye" > greeting.txt to replace the file content.

4

Display the final content of the file

Use the cat command to display the contents of greeting.txt so you can see the final text inside.

Linux CLI

echo "Hello World" > greeting.txt
echo "Welcome to Linux" >> greeting.txt
echo "Goodbye" > greeting.txt
# Use cat to show the contents of greeting.txt
# Your code here

Need a hint?

Use cat greeting.txt to see the file content.