export command in Linux CLI - Mini Project: Build & Apply

Using the export Command in Linux Shell

📖 Scenario: You are working in a Linux terminal and want to set environment variables that other programs and scripts can use.

🎯 Goal: Learn how to create a variable and use the export command to make it available to child processes.

📋 What You'll Learn

Create a shell variable with a specific name and value

Use the export command to set the variable as an environment variable

Verify the variable is available in a child shell

💡 Why This Matters

🌍 Real World

Setting environment variables is common when configuring software or scripts to use specific settings.

💼 Career

Knowing how to use <code>export</code> is essential for system administrators, developers, and anyone working with Linux shells.

1

Create a shell variable

Create a shell variable called MY_VAR and set its value to HelloWorld.

Linux CLI

# Create a shell variable called MY_VAR and set it to HelloWorld
# Your code here

Need a hint?

Use the syntax VARIABLE_NAME=value without spaces.

2

Export the variable

Use the export command to make the variable MY_VAR available to child processes.

Linux CLI

MY_VAR=HelloWorld
# Export the variable MY_VAR
# Your code here

Need a hint?

Use export VARIABLE_NAME to export the variable.

3

Check the variable in a child shell

Run a child shell and use the echo command to display the value of MY_VAR inside it.

Linux CLI

MY_VAR=HelloWorld
export MY_VAR
# Run a child shell and echo MY_VAR
# Your code here

Need a hint?

Use bash -c 'echo $MY_VAR' to run a command in a child shell.

4

Display the exported variable

Print the value of MY_VAR in the current shell using the echo command.

Linux CLI

MY_VAR=HelloWorld
export MY_VAR
bash -c 'echo $MY_VAR'
# Print MY_VAR in the current shell
# Your code here

Need a hint?

Use echo $MY_VAR to print the variable.