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

The solaris version of sed I could convince to work this way (in bash):

echo test1234foo123bar1234 | sed 's/\(1234\)/\
\1/g'

(you have to put the line break directly after the backslash).

In csh I had to put one more backslash:

echo test1234foo123bar1234 | sed 's/\(1234\)/\\
\1/g'

The Gnu version of sed simply worked using \n:

echo test1234foo123bar1234 | sed 's/\(1234\)/\n\1/g'