refering to https://unix.stackexchange.com/questions/200528/how-to-copy-the-lines-in-multiple-files-between-two-given-dates and https://unix.stackexchange.com/questions/200467/i-will-use-switch-statement.
I was wondering, shouldn't we add a new close reason : homework ?
This would generate a comment like :
Stackexchange is not a homework site, we might answer your question providing you show us what you have tried. Please edit your question with you personal research.