$cat workethics.txt
Work ethics in QA Fashion$
$od workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 064163 067551 000156
0000031
$od -N 21 workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 000163
0000025
$od -N 22 workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 064163
0000026
$od -N 23 workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 064163 000151
0000027
$od -N 24 workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 064163 067551
0000030
$od -N 25 workethics.txt
0000000 067527 0100562 062440 064164 061551 020163 067151 050440
0000020 020101 060506 064163 067551 000156
0000031
$
od - dump files in octal and other formats
-N, --read-bytes=BYTES
limit dump to BYTES input bytes

Write an unambiguous representation, octal bytes
by default, of FILE to standard output. With more
than one FILE argument, concatenate them in the
listed order to form the input. With no FILE, or when
FILE is -,read standard input.

Reference/Source :
Debian manual for command od.