Question: UNIX in putty 1. What command would you use to find every line in a file that contains the word hello with exact case matching

UNIX in putty

1. What command would you use to find every line in a file that contains the word hello with exact case matching (no matches on Hello)?

2. How would you change the command from question 8 so that the match is case insensitive (matches on hello or Hello or heLLO)?

3. What command would you use to find every line in every file in a directory that contains the keyword function (case insensitive)?

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