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How can I create a new file and fill it with 1 Gigabyte worth of random data? I need this to test some software. I would prefer to use devrandom or devurandom. share improve this question 8.274 19 57 75 asked Mar 7 ’12 at 0:26 17 Open vi with vi -w randomfile and ask someone who’s never seen vi to exit the program. 😉 – – Jun 8 ’16 at 3:34