Linux ExifTool PDF Metadata Editor

A simple but powerful ExifTool to edit pdf metada. You can check how simple to use it here.
Since it is so simple so nothing else to cover here :D, Lol.

As an example, If you have a pdf file called drawing.pdf and you want to update its metadata, Use the utility, exiftool, in this way:
exiftool -Title="This is the Title" -Author="Happy Man" -Subject="PDF Metadata" drawing.pdf