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I have a LibreOffice document that I converted to PDF at some point in time using the built-in capabilities. The timestamp on the PDF is later than on the word processing document, so that makes sense, but I am not absolutely sure that the word processing document produces exactly that PDF. The document is 20 pages long so it's not a good idea to check it manually.

One possibility is to redo the PDF in a different folder and then do a binary diff of the two PDFs. Unfortunately the command line diff indicates that the "binary files are different".

Is there a "smart binary diff" that will help me determine if the difference is merely in meta data or some such non-consequential difference?

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up vote 11 down vote accepted

In general it is a good idea to check if command + file extension are what your are looking for. diff+pdf results in diffpdf.

sudo apt-get install diffpdf


enter image description here

Source: Ubuntugeek.com.

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