Unix Regex To Remove Blank Lines Stack Overflow I'm trying to remove the blank lines and the invalid records in the single regex . but it seems to be not working. in the below example, records which contains serverserial:0 and servername:"" empt. Using an external command is a totally valid way to edit in ed, and assuming that all non empty lines are unique when compared to their immediately surrounding lines (i.e. non repeating), we could call uniq to remove the excess empty lines:.

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