linux - Different results with cut and dd on binary files -

my environment:

centos 6.5 

i need extract part of elf file.

when use dd command follows, have no problem:

$dd if=a.out of=a.cut1 bs=1 skip=16     

on other hand, when use cut command follows, created file has less size expected:

$cut --bytes=16- a.out > a.cut2 

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example, created a.out compiling following sample c program gcc (v. 4.4.7):

#include <stdio.h>  int main() {     printf("hello world\n"); } 

then, execute dd , cut commands above, have files following sizes:

a.out - 6415 bytes a.cut1 - 6399 bytes a.cut2 - 6356 bytes 

i wonder why cut command reduces size more specified.

cut skip first 16 bytes from each line whereas dd doesn't care lines , skips first 16 bytes whole file.

if file contains newlines - valid binary files - cut yield different result dd.