xxd.rst

xxd command

Synopsis

xxd <interface> <dev[:part]> <file>

Description

The xxd command prints the file content as hexdump to standard out.

interface

interface for accessing the block device (mmc, sata, scsi, usb, ....)

dev

device number

part

partition number, defaults to 1

file

path to file

Example

Here is the output for a example text file:

=> xxd mmc 0:1 hello
00000000: 68 65 6c 6c 6f 20 77 6f 72 6c 64 0a 00 01 02 03  hello world.....
00000010: 04 05                                            ..
=>

Configuration

The xxd command is only available if CONFIG_CMD_XXD=y.

Return value

The return value $? is set to 0 (true) if the file is readable, otherwise it returns a non-zero error code.