headless - this runs LibreOffice in headless mode (without a GUI).--convert-to doc:"writer_pdf_Export" - this tells LibreOffice what conversion format to use and that we'll be converting the file ...
TIP: You can convert, compress, sign PDF documents using free Acrobat Online tools. The next step, then, is to manage CutePDF if you’re interested in making certain changes to how it works.