Pipe operator (|) in Linux CLI - Mini Project: Build & Apply

Using the Pipe Operator (|) in Linux Command Line

📖 Scenario: You are working on a Linux system and want to process text data efficiently by combining commands.

🎯 Goal: Learn how to use the pipe operator | to send the output of one command as input to another command.

📋 What You'll Learn

Use the echo command to create text output

Use the grep command to filter lines containing a specific word

Use the pipe operator | to connect commands

Display the filtered result on the terminal

💡 Why This Matters

🌍 Real World

Using pipes is common in Linux to combine simple commands for powerful text processing without creating temporary files.

💼 Career

Many IT and developer jobs require using pipes to quickly analyze logs, filter data, and automate tasks efficiently.

1

Create a text output with echo

Write a command using echo to output the following three lines exactly: apple, banana, and cherry, each on its own line.

Linux CLI

# Write the echo command to output three lines: apple, banana, cherry
# Your code here

Need a hint?

Use echo -e with \n to create new lines.

2

Add a filter word variable

Create a variable called word and set it to banana.

Linux CLI

echo -e "apple\nbanana\ncherry"
# Create a variable called word and set it to banana
# Your code here

Need a hint?

Use word=banana without spaces around the equals sign.

3

Use the pipe operator to filter output

Use the pipe operator | to send the output of the echo command to grep. Use grep with the variable word to filter lines containing banana.

Linux CLI

echo -e "apple\nbanana\ncherry" | grep "$word"
# Your code here

Need a hint?

Use | between echo and grep. Use double quotes around $word.

4

Display the filtered result

Run the full command to display only the line containing banana on the terminal.

Linux CLI

# Run the command to show the filtered output
# Your code here

Need a hint?

The output should show only the word banana.