OD linux command manual
OD(1) User Commands OD(1)
od - dump files in octal and other formats
od [OPTION]... [FILE]...
od --traditional [FILE] [[+]OFFSET [[+]LABEL]]
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.
All arguments to long options are mandatory for short options.
decide how file offsets are printed
skip BYTES input bytes first
limit dump to BYTES input bytes
output strings of at least BYTES graphic chars
select output format or formats
do not use * to mark line suppression
output BYTES bytes per output line
accept arguments in traditional form
--help display this help and exit
output version information and exit
Traditional format specifications may be intermixed; they accumulate:
-a same as -t a, select named characters
-b same as -t oC, select octal bytes
-c same as -t c, select ASCII characters or backslash escapes
-d same as -t u2, select unsigned decimal shorts
-f same as -t fF, select floats
-h same as -t x2, select hexadecimal shorts
-i same as -t d2, select decimal shorts
-l same as -t d4, select decimal longs
-o same as -t o2, select octal shorts
-x same as -t x2, select hexadecimal shorts
For older syntax (second call format), OFFSET means -j OFFSET. LABEL
is the pseudo-address at first byte printed, incremented when dump is
progressing. For OFFSET and LABEL, a 0x or 0X prefix indicates hex-
adecimal, suffixes may be . for octal and b for multiply by 512.
TYPE is made up of one or more of these specifications:
a named character
c ASCII character or backslash escape
signed decimal, SIZE bytes per integer
floating point, SIZE bytes per integer
octal, SIZE bytes per integer
unsigned decimal, SIZE bytes per integer
hexadecimal, SIZE bytes per integer
SIZE is a number. For TYPE in doux, SIZE may also be C for
sizeof(char), S for sizeof(short), I for sizeof(int) or L for
sizeof(long). If TYPE is f, SIZE may also be F for sizeof(float), D
for sizeof(double) or L for sizeof(long double).
RADIX is d for decimal, o for octal, x for hexadecimal or n for none.
BYTES is hexadecimal with 0x or 0X prefix, it is multiplied by 512
with b suffix, by 1024 with k and by 1048576 with m. Adding a z suf-
fix to any type adds a display of printable characters to the end of
each line of output. --string without a number implies 3. --width
without a number implies 32. By default, od uses -A o -t d2 -w 16.
Written by Jim Meyering.
Report bugs to .
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
The full documentation for od is maintained as a Texinfo manual. If
the info and od programs are properly installed at your site, the com-
info coreutils od
should give you access to the complete manual.
od (coreutils) 5.2.1 May 2004 OD(1)