Sed: Adding new line after matching pattern

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1

Hi I just wanted to add a new line after every matching pattern:

The method doing this doesn't matter, however, I have been using sed and this is what I tried doing, knowing that I am a bit off:

sed 'Wf a\'/n'/g'

Basically, I want to add a new line after occurrence of Wf. After the line Wf is in and not after Wf itself.

2 
sed 's/Wf/&\
/g' file

or

sed 's/Wf/\
&/g' file

depending on how you want it.

3

\n would work with GNU sed:

sed 's/Wf/&\n/g' file
4

Thanks elixir_sinari but this is after Wf, I want a line appended after the line Wf occurs if you know what I mean.

5 
sed '/.*Wf.*/s//&\
/' file

or

sed '/Wf/a\
' file
6 
sed '/Wf/s/$/\
/' file