Agregar línea al comienzo del archivo UNIX
sed -i '1s/^/your text\n/' file #Note the addition of the "\n" for concluding the new line after the insertion
Big Feeeeeb
sed -i '1s/^/your text\n/' file #Note the addition of the "\n" for concluding the new line after the insertion$ sed -i '1s/^/added text /' file