Change three or more empty lines into two using bash, sed or awk

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Why can't I sed two [or more..] empty lines to one empty line?

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Using sed / awk to change words between two patterns

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Change header using sed or awk

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deleting lines between rows in a text file using awk or sed

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Squeeze multiple empty lines with sed

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How to replace one line with two lines using sed in csh on BSD?

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Delete 'N' no lines only on the Nth occurrence of a pattern in a file using the sed/awk command

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Get values from beginning of file, Insert values as new columns, trim beginning lines using AWK/GAWK/SED

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How to remove series of lines in a file on hp unix using awk or sed or grep

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Text Manipulation using sed or AWK

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String Replacing using Sed or Awk

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Bash - Sed / Awk replacing string with new line

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sed/awk remove newline on two pattern matches

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Extract two variables and rewrite multiple lines with sed

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How can I merge two files while printing a given value on resulting empty fields using AWK?

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Sed delete empty lines after a particular line number

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How to uncomment the a specific line which contains specific text in a hocon file using bash script(sed,awk..etc)

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Moving matching lines in a text file using sed

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Using "sed" to uncomment lines matching a certain pattern

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Remove empty line before a pattern using sed

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Exclude two or more directories in bash for loop

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awk how to set record separator as multiple consecutive empty lines or lines only include space and/or tab characters?

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Print lines between two patterns matching a condition in awk

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Comparing three (or more) dictionaries and finding a match if at least two are equal

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Run into error “empty beginning of file” when read.table in R with 5 or more first empty lines

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How to make bash built-in "read" ignore commented or empty lines?

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Bash Using variable names in sed to insert record

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Bash while loop search and replace using sed

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Replacing text strings in bash using awk