There is a problem for converting DOCX to PDF using Libreoffice.(in RTL documents) but converting same document saved in ODT format will works fine.
Anyone knows how to convert an existing DOCX file to ODT using Ubuntu bash?
Then you can use this command directly from command line
libreoffice --headless --convert-to odt *.docx
You can directly save it to odt format in Libre Office.
Click on save as
Select ODT as format
Name the file
Click on ok
来源：https://stackoverflow.com/questions/21845789/how-to-convert-docx-to-odt-with-libreoffice-on-ubuntu-bash