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hexdump - print input as hexadecimal

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  BUGS  AUTHOR  COPYRIGHT 

NAME

hexdump − print input as hexadecimal

SYNOPSIS

hexdump [−bCcdovx] [−n NUMBER] [−s NUMBER] [file ...]

hexdump [−r] [file ...]

DESCRIPTION

Input files are taken as a single stream of data and formatted as hexadecimal. Standard input is used if no file arguments are provided. Duplicate lines of input are filtered by default. A '*' character is printed to indicate one or more duplicate input lines.

OPTIONS

The following options are available:

−b

One−byte octal output.

−C

Output canonical hex+ASCII. Each line begins with an offset number followed by a space−separated list of 16 hex bytes. Printable input characters are listed between two '|' characters.

−c

Output a space−separated list of ASCII characters. Non−print characters are listed in octal, or a C−escape code.

−d

Format output as two−byte decimal.

−n NUMBER

Terminate the process after reading a set NUMBER of input bytes. The number argument must be given in decimal. Input skipped by the −s option is not counted.

−o

Format output as two−byte octal.

−r

Revert a hex dump back to binary. Input is expected to be formatted as canonical hex+ASCII. The initial offset address and the ASCII suffix of each line are ignored. Input lines may have zero or more hex bytes; running over 16 bytes is supported. Spaces between hex digits are ignored. An odd number of hex digits on a line results in an error.

Setting −r causes all other options. It is possible to specify multiple input files.

−s NUMBER

Skip a set NUMBER of bytes at the beginning of input. The number argument must be given in decimal. The offset number printed on output is advanced to reflect the skipped bytes.

−v

Duplicate lines of output are displayed.

−x

Format output as two−byte hexadecimal. This is the default.

BUGS

No option exists for setting an output filename, so the −r option will write binary data to a terminal if output is not redirected.

AUTHOR

Written by Michael Mikonos.

COPYRIGHT

Copyright (c) 2023 Michael Mikonos.

This code is licensed under the Artistic License 2.


Updated 2026-06-01 - jenkler.se | uex.se