Adding a header into multiple .txt files

Question

I need a batch file that will add the text \"Write In\" in a new line at the beginning of the content of hundreds of .txt files without removing any existing text. I found somet

Answer 1

You can simply use the Linux Sed command to insert a header into a file.

sed -i '1s/^/This is my header\n/' filename
e.g. sed -i '1s/^/Write In\n/' myfile.txt

This can be applied to multiple files under a directory:

For .txt files

for file in *.txt
do
  sed -i '1s/^/This is my header\n/' $file
done

For CSV files

for file in *.csv
do
  sed -i '1s/^/This is my header\n/' $file  
done