How to insert a line at the beginning of a file
How to insert a line at the beginning of a file?
Use the sed command and let it perform an inline replacement.
sed -i '1i # New first line' FILETo insert a line at the beginning of a file, we can use sed to achieve this task. By using in-place editing -i, we can instruct sed to make a change to an existing file. The next step is to tell sed what to change or insert and at what place.
sed -i '1i # New first line' mytextfile.txt
Explanation
- -i = inline file edit
- 1i = insert at first line
- # New first line = Text to add
