XK0-006 System Management Practice Question
A Linux administrator wants to search for the pattern 'ERROR' in all files under /var/log, ignoring case, and display line numbers. Which THREE options should be used with the grep command? (Select THREE).
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
-i
grep -r for recursive, -i for case-insensitive, -n for line numbers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
-c
Why it's wrong here
Counts matching lines, does not show line numbers.
- ✓
-i
Why this is correct
Ignores case distinctions.
- ✗
-v
Why it's wrong here
Inverts match, shows lines not matching.
- ✓
-n
Why this is correct
Shows line numbers.
- ✓
-r
Why this is correct
Recursively searches directories.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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