od(1) - Waikato Linux Users Group

OD

NAME SYNOPSIS DESCRIPTION AUTHOR REPORTING BUGS COPYRIGHT SEE ALSO

NAME

od - dump files in octal and other formats

SYNOPSIS

od [''OPTION''?... [''FILE''?... od --traditional [''FILE''? [[[''+''?OFFSET [[[''+''?LABEL]]

DESCRIPTION

Write an unambiguous representation, octal bytes by default, of FILE to standard output. With no FILE, or when FILE is -, read standard input.

-A, --address-radix=RADIX

decide how file offsets are printed

-j, --skip-bytes=BYTES

skip BYTES input bytes first on each file

-N, --read-bytes=BYTES

limit dump to BYTES input bytes per file

-s, --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, --width[=''BYTES''?

output BYTES bytes per output line

--traditional

accept arguments in pre-POSIX form

--help

display this help and exit

--version

output version information and exit

Pre-POSIX 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 hexadecimal, suffixes maybe . for octal and b multiply by 512.

TYPE is made up of one or more of these specifications:

named character

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, it is multiplied by 512 with b suffix, by 1024 with k and by 1048576 with m. Adding a z suffix to any type adds a display of printable characters to the end of each line of output. -s without a number implies 3. -w without a number implies 32. By default, od uses -A o -t d2 -w 16.