Appreciate everyone's responses so far. The difference is subtle. In my earlier post, the output needed to have 5 lines before and after each occurrence of a pattern but now in this thread, I want the output to have 5 lines before the pattern, the matched line to be printed only once even if there are multiple occurrences of same pattern or different patterns within same line and 5 lines after the matched line. I hope I am able to express the difference.

In reply to Re^4: Print line from file only once even if occurrence of pattern is more than once in the line (double?) by jayu_rao
in thread Print line from file only once even if occurrence of pattern is more than once in the line by jayu_rao

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