Password-protected PDF file with a single command line command Feb 5, 2023 — To password protect a PDF file with just a single command line command: -f password.pdf [-r password.txt] -n password.txt -f password.pdf is the file you are going to encrypt, and password.pdf is the password file you want to have as a password as well. —r password.txt is optional, and defines a default password. —n is required, by default, which means you will be asked for a new password upon every file save, even if you have already supplied one. How to password protect a PDF file -v PDF.pdf with single command line command If you don't have the option to password protect a PDF file, we recommend using the command line to do this. The simplest way to do it is: -w word list: PDF.pdf -p password This command will create one PDF file called PDF.pdf containing all words in the word list. It will set the password for this file to word list: PDF.pdf so you can access this file with the “-n” option for each password file you want to encrypt. How to password protect a PDF file -p: PDF.pdf with single command line command If you want to password protect a PDF file with multiple other PDFs, such as Word or PowerPoint PDFs, or even if you want to password protect a PDF file with files from other applications, you can follow these steps: -c “Word”,”PowerPoint”, “Podcast”, or “Photos” -b [password] -p password Example: -c Word You can then open up your PDFs with the file and password you set in the command line, by using the zip and password command with the PDF.pdf file as the zip file, a standard filename, or a filename of your choice. How to password protect a PDF file -w password.pdf with file name only -n password.