How to insert data to the first line of a file in bash

To insert data to the first line of a file in bash, we can use sed utility.

#sed -i '1i data' file

where,

data - data to be inserted

file - name of the file to be processed

The same can be do using the echo command.

#echo 'data'$'\n'"$(cat file)" > file

where,

data - data to be inserted

file - name of the file to be processed