od(1) — Linux manual page


OD(1)                         User Commands                        OD(1)

NAME         top

       od - dump files in octal and other formats

SYNOPSIS         top

       od [OPTION]... [FILE]...
       od [-abcdfilosx]... [FILE] [[+]OFFSET[.][b]]
       od --traditional [OPTION]... [FILE] [[+]OFFSET[.][b]

DESCRIPTION         top

       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.

       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.

       Mandatory arguments to long options are mandatory for short
       options too.

       -A, --address-radix=RADIX
              output format for file offsets; RADIX is one of [doxn],
              for Decimal, Octal, Hex or None

              swap input bytes according the specified order

       -j, --skip-bytes=BYTES
              skip BYTES input bytes first

       -N, --read-bytes=BYTES
              limit dump to BYTES input bytes

       -S BYTES, --strings[=BYTES]
              show only NUL terminated strings of at least BYTES (3)
              printable characters

       -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; 32 is implied when
              BYTES is not specified

              accept arguments in third form above

       --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, ignoring
              high-order bit

       -b     same as -t o1, select octal bytes

       -c     same as -t c,  select printable characters or backslash

       -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

   TYPE is made up of one or more of these specifications:
       a      named character, ignoring high-order bit

       c      printable character or backslash escape

              signed decimal, SIZE bytes per integer

              floating point, SIZE bytes per float

              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 B for Brain 16 bit,
       H for Half precision float, F for sizeof(float), D for
       sizeof(double), or L for sizeof(long double).

       Adding a z suffix to any type displays printable characters at
       the end of each output line.

   BYTES is hex with 0x or 0X prefix, and may have a multiplier suffix:
       b      512

       KB     1000

       K      1024

       MB     1000*1000

       M      1024*1024

       and so on for G, T, P, E, Z, Y, R, Q.  Binary prefixes can be
       used, too: KiB=K, MiB=M, and so on.

EXAMPLES         top

       od -A x -t x1z -v
              Display hexdump format output

       od -A o -t oS -w16
              The default output format used by od

AUTHOR         top

       Written by Jim Meyering.

REPORTING BUGS         top

       GNU coreutils online help:
       Report any translation bugs to

COPYRIGHT         top

       Copyright © 2024 Free Software Foundation, Inc.  License GPLv3+:
       GNU GPL version 3 or later <https://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.

SEE ALSO         top

       Full documentation <https://www.gnu.org/software/coreutils/od>
       or available locally via: info '(coreutils) od invocation'

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project
       can be found at ⟨http://www.gnu.org/software/coreutils/⟩.  If you
       have a bug report for this manual page, see
       ⟨http://www.gnu.org/software/coreutils/⟩.  This page was obtained
       from the tarball coreutils-9.5.tar.xz fetched from
       ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2024-06-14.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

GNU coreutils 9.5              March 2024                          OD(1)

Pages that refer to this page: scr_dump(5)