hexdump(1)hexdump(1)NAME
hexdump - reversible hexdump
SYNOPSIS
hexdump [ -v ] [ -f ] [ [ -i ] inputfile ] [ -o outputfile ] [ -w # ]
DESCRIPTION
hexdump is the standard utility for viewing binary files.
Together with hex2bin, hexdump is also a utility for editing binary
files. First you hexdump the file, then you modify the dump-file in an
editor, then you use hex2bin to produce the modified binary file.
OPTIONS-v causes hexdump to display all input data. Without this option,
any number of output lines that are identical to the immediately
preceding output line (except for the input offset), are replaced
with a line comprised of a single asterisk. This makes output more
concise e.g. if input contains a long sequence of one repeated
byte value.
-w # specifies the number of hex-dumped bytes per output line. Minimum
is 1, maximum is 10240 but can be changed in the source. Default
is 16.
-f (flush-mode) causes hexdump to reflect its input immediately.
Without this option, output is buffered (on ttys this means lineb‐
uffered, otherwise even blockbuffered). This option is especially
useful, if you want to watch bytes as they are trickling out of a
binary device. (e.g. /dev/mouse, /dev/ttyS1)
For obvious reasons, this implies -v.
[-i] inputfile
at most one inputfile can be given. if none is, then stdin will be
used for input. (Giving more Inputfiles would have no sense.) On
systems where textfiles and binaries are treated differently (such
as MS-DOS) an inputFile should be given, as input-redirection may
be flakey with binary data.
-o outputfile
at most one outputfile can be given. if none is, then stdout will
be used for output.
BUGS
none ;-)
SEE ALSOhex2bin(1)COPYRIGHT
Copyright (c) 2001 by Andreas Leitgeb (AvL)
(avl@logic.at)
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, pro‐
vided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in sup‐
porting documentation.
24 Mar 2001 hexdump(1)
