title: Convert a hex dump back to its original binary form
body: <p>I need do reverse Hex Dump, convert nvram memory block hex dump to the binary file (.bin). The memory block dump looks like this:</p>
  
  <pre><code>00010000    4293  D306  0123  195A  3360  18EB  66D0  60CB
  00010010    E003  68C9  42B9  D1EE  1C0F  2201  4494  4663
  00010020    B2DC  1C2B  335C  781B  42A3  D8C6  1C2B  33A0
  00010030    1C34  601E  E039  4B21  681B  930A  7822  920B
  00010040    8863  88A2  469C  23F8  021B  421A  D001  22A7
  .... ....
  </code></pre>
  
  <p>Should I use just this xxd command, without additional options?</p>
  
  <pre><code>xxd -r block.txt block.bin
  </code></pre>