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

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.

Plus Code