An example of how to do document convertion in batch at shell using openoffice: http://www.xml.com/lpt/a/2006/01/11/from-microsoft-to-openoffice.html

Tip for calc for libreoffice - http://www.thegeekstuff.com/2011/10/openoffice-calc-tips

Using Draw to edit PDF in linux - http://kryogenix.org/days/2013/11/25/editing-a-pdf-sorta-on-ubuntu-2013-edition

Using stardict at command line - http://www.lainoox.com/command-line-dictionary-at-your-fingertips/