dd 를 사용해서 파일의 일부를 특정 부분부터 원하는 양을 자유롭게 복사할 수 있는 방법이 있다.


This should do it (on gnu dd):

dd if=somefile bs=4096 skip=1337 count=31337000 iflag=skip_bytes,count_bytes

In case you are using seek= as well, you may also consider oflag=seek_bytes.

From info dd:

`count_bytes'
      Interpret the `count=' operand as a byte count, rather than a
      block count, which allows specifying a length that is not a
      multiple of the I/O block size.  This flag can be used only
      with `iflag'.

`skip_bytes'
      Interpret the `skip=' operand as a byte count, rather than a
      block count, which allows specifying an offset that is not a
      multiple of the I/O block size.  This flag can be used only
      with `iflag'.

`seek_bytes'
      Interpret the `seek=' operand as a byte count, rather than a
      block count, which allows specifying an offset that is not a
      multiple of the I/O block size.  This flag can be used only
      with `oflag'.

Ps: I understand this question is old and it seems these flags were implemented after the question was originally asked, but since it's one of the first google results for a related dd search I did, I though it would be nice to update with the new feature.


https://superuser.com/questions/380717/how-to-output-file-from-the-specified-offset-but-not-dd-bs-1-skip-n#


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