Sometimes you want to batch convert office files from say .doc to .docx to bring yourself into the 2010's but you can't find a format convertor.

LibreOffice has an application known as unoconv

Which is very cool

unoconv -l & # start the listener

# convert a Word 97 format file to docx
unoconv -f docx GXS\ Setup\ Costs.doc

#ls GXS\ Setup\ Costs.doc*
#GXS Setup Costs.doc  GXS Setup Costs.docx

Ref: http://linuxsleuthing.blogspot.com.au/2012/01/unoconv-is-number-one.html