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The -i switch in the grep command is used to perform a case-insensitive search. When you use -i with grep, it tells grep to ignore the distinction between uppercase and lowercase letters while searching for a pattern in the input text.
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
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