od
dump files in octal and other formats
Synopsis
od
[OPTION]... [FILE]...
od [-abcdfilosx]... [FILE]
[[+]OFFSET[.][b]]
od --traditional [OPTION]... [FILE]
[[+]OFFSET[.][b]
[+][LABEL][.][b]]
add an example, a script, a trick and tips
examples
source
echo od -Ad -tcx1 $1
od -Ad -tcx1 $1
description
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.
-A,
--address-radix=RADIX
decide how file offsets are
printed
-j,
--skip-bytes=BYTES
skip BYTES input bytes
first
-N,
--read-bytes=BYTES
limit dump to BYTES input
bytes
-S BYTES,
--strings[=BYTES]
output strings of at least
BYTES graphic chars
-t,
--format=TYPE
select output format or
formats
-v,
--output-duplicates
do not use * to mark line
suppression
-w[BYTES],
--width[=BYTES]
output BYTES bytes per output
line
--traditional
accept arguments in traditional
form
--help
display this help and exit
--version
output version information and
exit
Traditional
format specifications may be intermixed; they
accumulate:
-a
same as -t a, select named characters,
ignoring high-order bit
-b
same as -t o1, select octal bytes
-c
same as -t c, select ASCII characters or
backslash escapes
-d
same as -t u2, select unsigned decimal
2-byte units
-f
same as -t fF, select floats
-i
same as -t dI, select decimal ints
-l
same as -t dL, select decimal longs
-o
same as -t o2, select octal 2-byte
units
-s
same as -t d2, select decimal 2-byte
units
-x
same as -t x2, select hexadecimal
2-byte units
If first and
second call formats both apply, the second format is assumed
if the last operand begins with + or (if there are 2
operands) a digit. An OFFSET operand 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 hexadecimal; 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, ignoring
high-order bit
c
ASCII character or backslash escape
d[SIZE]
signed decimal, SIZE bytes per
integer
f[SIZE]
floating point, SIZE bytes per
integer
o[SIZE]
octal, SIZE bytes per
integer
u[SIZE]
unsigned decimal, SIZE bytes
per integer
x[SIZE]
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, and may have a
multiplier suffix: b 512, kB 1000, K 1024, MB 1000*1000, M
1024*1024, GB 1000*1000*1000, G 1024*1024*1024, and so on
for T, P, E, Z, Y. Adding a z suffix to any type displays
printable characters at the end of each output line. Option
--string without a number implies 3;
option --width without a number implies
32. By default, od uses -A o -t oS
-w16.
copyright
Copyright © 2012 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute
it. There is NO WARRANTY, to the extent permitted by law.
reporting bugs
Report od bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page:
<http://www.gnu.org/software/coreutils/>
General help using GNU software:
<http://www.gnu.org/gethelp/>
Report od translation bugs to
<http://translationproject.org/team/>
see also
The full
documentation for od is maintained as a Texinfo
manual. If the info and od programs are
properly installed at your site, the command
info
coreutils 'od invocation'
should give you
access to the complete manual.
author
Written by Jim
Meyering.