You want to create a function greet that prints "Hello" followed by the current username. Which is the correct function?

hard🚀 Application Q8 of 15

Bash Scripting - Functions

You want to create a function greet that prints "Hello" followed by the current username. Which is the correct function?

Agreet() { echo "Hello $USERNAME"; }

Bgreet() { echo "Hello $user"; }

Cgreet() { echo "Hello $USER"; }

Dgreet() { echo "Hello $(whoami)"; }

Step-by-Step Solution

Solution:

Step 1: Understand environment variables and commands
$USER is usually set but may not always be reliable; $(whoami) runs the command to get the current username.
Step 2: Evaluate each option
greet() { echo "Hello $USER"; } uses $USER which may work but is environment-dependent. greet() { echo "Hello $user"; } uses lowercase $user which is usually undefined. greet() { echo "Hello $(whoami)"; } uses $(whoami) which always returns the current username. greet() { echo "Hello $USERNAME"; } uses $USERNAME which is not standard in bash.
Final Answer:
greet() { echo "Hello $(whoami)"; } -> Option D
Quick Check:
Use $(whoami) for reliable current username [OK]

Quick Trick: Use $(whoami) to get current username reliably [OK]

Common Mistakes:

MISTAKES

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