Quiz: searching and editing text

Question 1 of 10

grep patterns: where a match sits, -w, -E and |, -o, the dot; a sed replacement with a line address and an in-place edit with -i.bak; awk fields and the -F separator. The questions follow the lessons “Regular expressions in grep” and “sed and awk: editing and fields of a stream”.

10 questions · threshold 70%

One correct answer

A log has three lines: `WARN disk 91%`, `Warning: swap used` and `user=swarnick login`. Which of them will `grep -i warn` print?

WARN and Warning.
The WARN line.
The user=swarnick line.
All three.

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Quiz: searching and editing text

A log has three lines: WARN disk 91%, Warning: swap used and user=swarnick login. Which of them will grep -i warn print?

A log has three lines: `WARN disk 91%`, `Warning: swap used` and `user=swarnick login`. Which of them will `grep -i warn` print?