Given a file called birthdays containing lines like: YYYY-MM-DD Name 1983-06-02 Tim 1995-12-17 Sue Which command would you use to output the lines belonging to all people listed whose birthday is in May or June?
A) grep '[56]' birthdays
B) grep 05?6? birthdays
C) grep '[0-9]*-0[56]-' birthdays
D) grep 06 birthdays | grep 05

Question

Given a file called birthdays containing lines like:   YYYY-MM-DD Name   1983-06-02 Tim   1995-12-17 Sue Which command would you use to output the lines belonging to all people listed whose birthday is in May or June?
A) grep '[56]' birthdays
B) grep 05?6? birthdays
C) grep '[0-9]*-0[56]-' birthdays
D) grep 06 birthdays | grep 05

Quizplus · Accepted Answer

The pattern '[0-9]*-0[56]-' matches any line where the month is either 05 (May) or 06 (June) by looking for the format YYYY-05- or YYYY-06-.

Given a File Called Birthdays Containing Lines Like: YYYY-MM-DD Name