One “naughty” thing you can do is write invisible data into the last block of a file… - truncate the file to extend it to the end of the last block - write da

One “naughty” thing you can do is write invisible data into the last block of a file… - truncate the file to extend it to the end of the last block - write data to that area - truncate the file back to its original size An edit of that file will likely lose you data though.