Thanks pme. That had just three lines before the occurrence of a pattern. My requirement is something like this: The line could have text such as: "ERROR - Critical error" or "ERROR - <module> threw an error" or "FATAL - Fatal error" or "java.lang.OutOfMemoryError" and I needed 5 lines before the matched line, matched line and 5 lines after the matched line to be printed. Note that the lines could occur immediately after one another and I would like to have output print only once in such cases.

In reply to Re^4: Print line from file only once even if occurrence of pattern is more than once in the line 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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