Insert linefeed in sed (Mac OS X)

Question

How do I insert a newline in the replacement part of sed?

This code isn\'t working:

sed \"s/\\(1234\\)/\\n\\1/g\" input.txt > output.txt
         


        

Answer 1

Get a GNU sed.

$ brew install gnu-sed

Then your command will work as expected:

$ gsed "s/\(1234\)/\n\1/g" input.txt
test
1234foo123bar
1234

nb: you may get GNU sed thanks to mac ports too.