You run diff file1.txt and get the error: diff: missing operand after 'file1.txt'. What is the most likely reason?

medium📝 Debug Q6 of 15

Linux CLI - Viewing and Editing Files

You run diff file1.txt and get the error: diff: missing operand after 'file1.txt'. What is the most likely reason?

AYou provided only one file; diff requires two files to compare.

BThe file <code>file1.txt</code> does not exist.

CYou need to add the <code>-r</code> option for recursive comparison.

DYou must run diff as root to compare files.

Step-by-Step Solution

Solution:

Step 1: Analyze error message
The error indicates diff expects another operand (file) after the first.
Step 2: Understand diff usage
diff requires two files or directories to compare; providing only one causes this error.
Final Answer:
You provided only one file; diff requires two files to compare. -> Option A
Quick Check:
diff needs two files as arguments [OK]

Quick Trick: diff needs two files to compare [OK]

Common Mistakes:

Master "Viewing and Editing Files" in Linux CLI

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Linux CLI Quizzes