参考 command line - How to create a file with a given size in Linux? - Stack Overflow http://stackoverflow.com/questions/139261/how-to-create-a-file-with-a-given-size-in-linux fallocate -l 5G bar fallocateで素早く仮想化ディスクを用意する | Linux | マイノリティでいこう http://blog.be-dama.com/2013/03/01/fallocate%E3%81%A7%E7%B4%A0%E6%97%A9%E3%81%8F%E4%BB%AE%E6%83%B3%E5%8C%96%E7%94%A8%E3%81%AE%E3%83%87%E3%82%A3%E3%82%B9%E3%82%
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