od 命令

常用示例

说明

od (octal dump) writes an unambiguous representation of its input to standard output. By default it displays data in octal, with each line showing an offset and the data values. The tool is useful for inspecting binary files, examining non-printable characters, and debugging data formats. Duplicate lines in the output are replaced by a single \* character unless -v is used.

参数

-A _RADIX_, --address-radix=_RADIX_

Address radix: d (decimal), o (octal), x (hex), n (none)

-t _TYPE_, --format=_TYPE_

Output type (a, c, d, f, o, u, x with optional size suffix)

-a

Named characters, same as -t a (ignores high-order bit).

-b

Octal bytes, same as -t o1.

-c

Printable characters or backslash escapes, same as -t c.

-d

Unsigned decimal, two-byte units, same as -t u2.

-f

Floating point, same as -t fF.

-i

Decimal int (sizeof(int)), same as -t dI.

-l

Decimal long, same as -t dL.

-o

Octal, two-byte units, same as -t o2.

-s

Decimal, two-byte units, same as -t d2.

-x

Hexadecimal, two-byte units, same as -t x2.

-j _BYTES_, --skip-bytes=_BYTES_

Skip BYTES input bytes first

-N _BYTES_, --read-bytes=_BYTES_

Limit dump to BYTES input bytes

-v, --output-duplicates

Do not use * to mark line suppression

-w_BYTES_, --width=_BYTES_

Output BYTES bytes per output line (default 32)

-S _BYTES_, --strings=_BYTES_

Show only NUL-terminated strings of at least BYTES printable characters

--endian={big|little}

Swap input bytes according to the specified byte order