title: Appending 0's to make 1MB file with dd
body: <p>I have a binary file <code>abc.bin</code> that is 512 bytes long, and I need to generate 1M (1024 x 1024 = 1048576) byte file by appending 0's (0x00) to the <code>abc.bin</code>. How can I do that with <code>dd</code> utility? </p>
  
  <p>For example, <code>abc.bin</code> has 512 bytes of 0x01 ("11 ... 11"), and I need to have a helloos.bin that is 1048576 bytes ("11 ... 11000 ... 000"); the 0 is not '0', but 0x00, and the number of 0x00 is 1048576 - 512.  </p>