sed insert line command OSX

Question

I\'m trying to insert text to the third line in a file using sed, and the syntax I\'ve found on other forums is:

sed -i \'\' \"3i\\ text to insert\" file
         


        

Answer 1

I've found that I have to insert a \ at the end of the line to be inserted, otherwise it concatenates it at the beginning of the original line. So, if I want to insert a new third line,...

sed -i '' '3i\

New line to be inserted.\

' file