[Solved] Identify the error in the command: grep -i 'hello' file.txt -r — Ans: The -r option is misplaced and invalid here | Linux CLI

Linux CLI - Linux Basics and Terminal

Identify the error in the command: grep -i 'hello' file.txt -r

AThe -r option is misplaced and invalid here

BThe quotes around 'hello' are incorrect

CThe file name should come before options

DThere is no error in this command

Step-by-Step Solution

Solution:

Step 1: Understand grep options and order
'-i' is a valid option for case-insensitive search. '-r' is for recursive search but must come before arguments.
Step 2: Check option placement
Options should come before arguments. Here, '-r' is after the file name, which is incorrect and causes error.
Final Answer:
The -r option is misplaced and invalid here -> Option A
Quick Check:
Options before arguments [OK]

Quick Trick: Put all options before arguments in commands [OK]

Common Mistakes:

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Identify the error in the command: grep -i 'hello' file.txt -r