docx2pdf

# Path of LibreOffice installation
cd /Applications/LibreOffice.app/Contents/MacOS

# General command
./soffice --headless --convert-to <extention> <path+file>

# Automatically convert all .odt files to pdf
./soffice --headless --convert-to pdf ~/Downloads/*.odt

# To specify an output folder you can add the --outdir option
./soffice --headless --convert-to pdf --outdir /home/user ~/Downloads/*.odt

# Options
./soffice --help

# found at: http://ask.libreoffice.org/en/question/12084/how-to-convert-documents-to-pdf-on-osx/