Insert newline (\n) using sed

Question

I am trying to scrub some lists into a properly formatted CSV file for database import.

My starting file, looks something like this with what is supposed to be each &

Answer 1

Add a line after a match.

The sed command can add a new line after a pattern match is found. The "a" command to sed tells it to add a new line after a match is found.

sed '/unix/ a "Add a new line"' file.txt

unix is great os. unix is opensource. unix is free os.

    "Add a new line"
    
    learn operating system.
    
    unixlinux which one you choose.
    
    "Add a new line"

Add a line before a match

The sed command can add a new line before a pattern match is found. The "i" command to sed tells it to add a new line before a match is found.

sed '/unix/ i "Add a new line"' file.txt

"Add a new line"

unix is great os. unix is opensource. unix is free os.

learn operating system.

"Add a new line"

unixlinux which one you choose.