Export OpenOffice.org doc to PDF via CLI

How would I do this from the command line? Currently on 4.1.5
User community support forum for Apache OpenOffice, LibreOffice and all the OpenOffice.org derivatives
https://forum.openoffice.org/en/forum/
https://forum.openoffice.org/en/forum/viewtopic.php?f=17&t=94684
$ libreoffice5.4 --help
[...]
--convert-to OutputFileExtension[:OutputFilterName] [--outdir output_dir]
Batch convert files (implies --headless). If --outdir
isn't specified, then current working directory is used
as output_dir. If --convert-to is used more than once,
last value of OutputFileExtension[:OutputFilterName] is
effective. If --outdir is used more than once, only its
last value is effective. For example:
--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
[...]