XK0-006 System Management Practice Question
An administrator needs to find the line number of the first occurrence of the string 'ERROR' in a log file, ignoring case. Which command is most appropriate?
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
✓
grep -in 'error' logfile
grep -in 'error' logfile will output the line numbers with matches, ignoring case. The first line will be shown first if no other sorting is applied.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
grep -n 'ERROR' logfile
Why it's wrong here
Does not ignore case, so it would miss 'error'.
- ✗
sed -n '/ERROR/=' logfile
Why it's wrong here
Shows line numbers but is case sensitive.
- ✗
awk '/ERROR/ {print NR}' logfile
Why it's wrong here
Case sensitive and prints all matching lines, not just the first.
- ✓
grep -in 'error' logfile
Why this is correct
-i for case insensitive, -n for line numbers.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.