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I worked on a notebook a few weeks ago and now I can't find after looking through the most likely directories. The recent list only has 6 items in it, none of them the notebook in question. Is there a way to find ALL notebooks I have created or opened?

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    $\begingroup$ You may use your OS commands ... find, search, whatever $\endgroup$
    – Dr. belisarius
    Nov 11, 2013 at 19:28
  • $\begingroup$ Yes, but then the wolfram Force would not be with me. $\endgroup$
    – Tyler Durden
    Nov 11, 2013 at 19:39
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    $\begingroup$ @Tyler Durden: Are you sure Edward Norton's character didn't put it somewhere else? $\endgroup$
    – user484
    Nov 11, 2013 at 19:40
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    $\begingroup$ Sometimes I wake up and things are missing. $\endgroup$
    – Tyler Durden
    Nov 11, 2013 at 19:41
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    $\begingroup$ I have to agree with belisarius and Sjoerd, use the OS search facility. E.g. on Windows 7 you just hit the windows button and type ext:.nb date:>25/10/2013 to instantly find all notebooks modified after 25th October. $\endgroup$
    – Simon Woods
    Nov 11, 2013 at 19:55

2 Answers 2

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There is a way to tell Mathematica to remember, in its File->Open list, long list of files you have opened and not the default of 8.

Mathematica graphics

The above is from options. Simply change the value from 8 to say 100, and now you will have all those files remembered. I used to have the same problem as you until I found this option.

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The following function finds a notebook (a .nb file) with a given maximum age (in days) in a given directory or its subdirectories:

notebookSearch[dir_String, age_?NumericQ] := 
   Select[
      FileNames["*.nb", {dir}, Infinity], 
      First[DateDifference[FileDate[#], DateList[], "Day"]] <= age &
   ]
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