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This question already has an answer here:

If you are hurrying to flag this question as a duplicate of this or this questions, please stop, the answers on those questions do not provide an answer to the question here.

After I asked this question I found that title and file name are pretty much different, so then I tried changing the pdf document's title to whatever I want to?.

I tried with Okular, but it doesn't let me change the title, I also tried GIMP but it just don't seem to have the option. I even tried verifying the document properties with Dolphin and it does not work either. How to change the title then?.

marked as duplicate by Glutanimate, Eric Carvalho, mikewhatever, karel, David Foerster Mar 2 '15 at 11:43

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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Solution:

After a deep web search using google, I found a tool called pdftk. How to install pdftk: sudo apt-get install pdftk then created a file containing the following information:

InfoKey: Title
InfoValue: New Title

And saved it in the same location the PDF is, then I ran in a terminal (in the PDF’s location):

pdftk File.pdf update_info mynewtextfile output NewFile.pdf

The PDF’s title is now "New Title".

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