Which of the following is the correct syntax to search for the word error in a file named log.txt using grep?

easy📝 Syntax Q12 of 15

Linux CLI - Text Processing

Which of the following is the correct syntax to search for the word error in a file named log.txt using grep?

Agrep log.txt error

Bgrep -f error log.txt

Cgrep error log.txt

Dgrep -e log.txt error

Step-by-Step Solution

Solution:

Step 1: Recall grep syntax
The basic syntax is grep [pattern] [file]. So to search for 'error' in 'log.txt', use grep error log.txt.
Step 2: Analyze other options
grep -f error log.txt uses -f which expects a file of patterns, not a pattern string. Options C and D have arguments reversed or incorrect flags.
Final Answer:
grep error log.txt -> Option C
Quick Check:
grep pattern file = grep error log.txt [OK]

Quick Trick: Use grep pattern filename order to avoid errors [OK]

Common Mistakes:

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