[Solved] How to match two new lines (\n) instead of one, in regex? [duplicate]

Question

A very quick way is using awk

awk 'BEGIN{RS="";ORS="\n\n"}1' /path/to/your/file > /path/to/new/file

How does this work:

awk knowns the concept records (which is by default lines) and you can define a record by its record separator RS. If you set the value of RS to an empty string, it will match any multitude of empty lines as a record separator. The value ORS is the output record separator. It states which separator should be printed between two consecutive records. This is set to two <newline> characters. Finally, the statement 1 is a shorthand for {print $0} which prints the current record followed by the output record-separator ORS.

Accepted Answer

A very quick way is using awk

awk 'BEGIN{RS="";ORS="\n\n"}1' /path/to/your/file > /path/to/new/file

How does this work:

awk knowns the concept records (which is by default lines) and you can define a record by its record separator RS. If you set the value of RS to an empty string, it will match any multitude of empty lines as a record separator. The value ORS is the output record separator. It states which separator should be printed between two consecutive records. This is set to two <newline> characters. Finally, the statement 1 is a shorthand for {print $0} which prints the current record followed by the output record-separator ORS.