Nautilus Connect to Server (webdav for Box.com): выберите местный пункт назначения

--headless --convert-to pdf:writer_pdf_Export

 "-env:UserInstallation=file:///tmp/LibreOffice_Conversion_${USER}"

$ mkdir ${HOME}/lo_pdfs

/path/to/soffice                                                     \
  --headless                                                         \
  "-env:UserInstallation=file:///tmp/LibreOffice_Conversion_${USER}" \
  --convert-to pdf:writer_pdf_Export                                 \
  --outdir ${HOME}/lo_pdfs                                           \
/path/to/test.docx

$ /path/to/libreoffice -h  # if that path exists, which I doubt!
$ /path/to/soffice -h
$ /path/to/soffice.bin -h

 $ /Applications/LibreOffice.app/Contents/MacOS/soffice -h 

 LibreOffice 5.1.2.2 d3bf12ecb743fc0d20e0be0c58ca359301eb705f

 Usage: soffice [options] [documents...]

 Options:
 --minimized    keep startup bitmap minimized.
 --invisible    no startup screen, no default document and no UI.
 --norestore    suppress restart/restore after fatal errors.
 --quickstart   starts the quickstart service
 --nologo       don't show startup screen.
 --nolockcheck  don't check for remote instances using the installation
 --nodefault    don't start with an empty document
 --headless     like invisible but no user interaction at all.
 --help/-h/-?   show this message and exit.
 --version      display the version information.
 --writer       create new text document.
 --calc         create new spreadsheet document.
 --draw         create new drawing.
 --impress      create new presentation.
 --base         create new database.
 --math         create new formula.
 --global       create new global document.
 --web          create new HTML document.
 -o             open documents regardless whether they are templates or not.
 -n             always open documents as new files (use as template).

 --display <display>
       Specify X-Display to use in Unix/X11 versions.
 -p <documents...>
       print the specified documents on the default printer.
 --pt <printer> <documents...>
       print the specified documents on the specified printer.
 --view <documents...>
       open the specified documents in viewer-(readonly-)mode.
 --show <presentation>
       open the specified presentation and start it immediately
 --accept=<accept-string>
       Specify an UNO connect-string to create an UNO acceptor through which
       other programs can connect to access the API
 --unaccept=<accept-string>
       Close an acceptor that was created with --accept=<accept-string>
       Use --unnaccept=all to close all open acceptors
 --infilter=<filter>[:filter_options]
       Force an input filter type if possible
       Eg. --infilter="Calc Office Open XML"
           --infilter="Text (encoded):UTF8,LF,,,"
 --convert-to output_file_extension[:output_filter_name[:output_filter_options]] [--outdir output_dir] files
       Batch convert files (implies --headless).
       If --outdir is not specified then current working dir is used as output_dir.
       Eg. --convert-to pdf *.doc
           --convert-to pdf:writer_pdf_Export --outdir /home/user *.doc
           --convert-to "html:XHTML Writer File:UTF8" *.doc
           --convert-to "txt:Text (encoded):UTF8" *.doc
 --print-to-file [-printer-name printer_name] [--outdir output_dir] files
       Batch print files to file.
       If --outdir is not specified then current working dir is used as output_dir.
       Eg. --print-to-file *.doc
           --print-to-file --printer-name nasty_lowres_printer --outdir /home/user *.doc
 --cat files
       Dump text content of the files to console
       Eg. --cat *.odt
 --pidfile=file
       Store soffice.bin pid to file.
 -env:<VAR>[=<VALUE>]
       Set a bootstrap variable.
       Eg. -env:UserInstallation=file:///tmp/test to set a non-default user profile path.

 Remaining arguments will be treated as filenames or URLs of documents to open.

--infilter="Microsoft Word 2007/2010/2013 XML"

--infilter="Microsoft Word 2007/2010/2013 XML"
--infilter="Microsoft Word 2007-2013 XML"
--infilter="Microsoft Word 2007-2013 XML Template"
--infilter="Microsoft Word 95 Template"
--infilter="MS Word 95 Vorlage"
--infilter="Microsoft Word 97/2000/XP Template"
--infilter="MS Word 97 Vorlage"
--infilter="Microsoft Word 2003 XML"
--infilter="MS Word 2003 XML"
--infilter="Microsoft Word 2007 XML Template"
--infilter="MS Word 2007 XML Template"
--infilter="Microsoft Word 6.0"
--infilter="MS WinWord 6.0"
--infilter="Microsoft Word 95"
--infilter="MS Word 95"
--infilter="Microsoft Word 97/2000/XP"
--infilter="MS Word 97"
--infilter="Microsoft Word 2007 XML"
--infilter="MS Word 2007 XML"
--infilter="Microsoft WinWord 5"
--infilter="MS WinWord 5"