I'm writing a bash script that encrypts the data of a folder or file
#!/bin/bash
file_name=$1
tmp_file=/tmp/tmpfile.tar
# tar compress file
tar -cf $tmp_file $file_name;
# encrypt file
gpg -c $tmp_file
# remove temp file
rm -rf $tmp_file $file_name
# mv encrypted file to orignal place
mv ${tmp_file}.gpg $file_name
but the data will still be recoverable by using photorec or similar methods...
Is there a way to ensure the absolute deletion of the original file in bash?