BashScript - Cara Mempassword PDF

How To Add Password To Your PDF Docs On Ubuntu
First thing you have to do is install pdftk , pdftk is complete command line pdf tool engine to manipulate PDF documents… sure its an open source ware :)

open your Ubuntu Terminal [CTRL+ALT+T]
install pdftk by using this command : sudo apt-get install pdftk
make sure pdftk is now installed by write this on terminal : pdftk
you will see a bunch of pdftk command instructions if it already installed
simply using this command to add a password to your existing pdf document
pdftk <source>.pdf output <destination>.pdf userpw <password>

example:

pdftk Mydocs.pdf output Mydocs_pass.pdf userpw secretword

make sure you put complete filename and .pdf extension