title: What is a good method for making a huge test file?
body: <p>I'm trying to test some streaming file upload/download code that I've just written, but I need a huge (bigger than my memory, as in > 4GB) file to test on.  What's a good way to quickly generate a file of a specific size (but no particular data inside)?</p>
  
  <p>I know that I could just look around my hard drive for an appropriately-sized file, but I'm curious if there are any other good ways for generating test files, especially if I want a specific size.  Downloading files is no good either, since my connection is slow.</p>