---
name: "hextype"
section: "1"
platform: "linux"
package: "hextype"
version: "3.0-10"
release: "Debian 3.0 (Woody)"
platforms: ["linux"]
url: "https://new.carta.tech/hextype"
---

# hextype(1)

hexadecimal dump program

## NAME

hextype - hexadecimal dump program

## SYNOPSIS

**hextype** \[-l \<numlines\> \| -b \<numbytes\>\] files...\

## DESCRIPTION

**hextype** displays a hexadecimal output of each file given at the commandline.

The output consists of 3 columns. Each row contains up to 16 characters. The first column contains the address of the row (in 16-byte words). In the second column each byte is represented by its hex-value (00 to FF) and in the third are the bytes in printable characters (unlike *od -c* **hextype** does not print unprintable chars with a 2-char "escape-sequence". They are replaces by a dot.

If no filename is specified **hextype** prints a short version information and exits.

## OPTIONS

- **files...**

  The files to be hextyped. The following options are aplied for all files.

- **numlines**

  The number of lines to be display for each file. **Hextype** displayes only the first *numlines* number of lines.

- **numbytes**

  The number of bytes to be display for each file. **Hextype** displayes only the first *numbytes* number of bytes.

  It does not make much sense to use -b and -l together. Therefor only the last option is used. So **hextype** *-b 4 -l 10 data.bin* would display the first 10 lines (or 160 bytes).

## BUGS

When processing *stdin* hextype does not stop reading on the first solitary *EOF* (Ctrl-D) character in the input stream. Two EOF chars are required to end reading from stdin.

## TODO

Support reading from stdin. Use [mmap(2)](/mmap/2.md) instead of subsequent fread(2) for better performance.

## AUTHOR

**hextype** was written by Juergen P. Meier (JPM@mailserv.rz.fh-muenchen.de) and comes under the conditions of the GNU General Public License. See the file COPYING for details.

## FILES

/proc/self/fd/0 - stdin of a process

## SEE ALSO

[od(1)](/od/1.md), [proc(5)](/proc/5.md)