xxd 命令

常用示例

说明

xxd creates a hexadecimal dump of a file or standard input. The output shows the offset, hexadecimal values, and ASCII representation of the data. It can also reverse a hex dump back to the original binary. The default output format shows 16 bytes per line with the file offset, hex values in groups of 2 bytes, and printable ASCII characters. The -p option produces a continuous hex string without formatting. The -i option generates C source code with the data as an unsigned char array, useful for embedding binary data in programs. The -r option reverses the process, converting a hex dump back to binary. Combined with -p, it can convert plain hex strings to binary data.

参数

-b

Binary digit dump instead of hexadecimal

-c _cols_

Format output with specified columns per line (default: 16)

-g _bytes_

Number of bytes per group (default: 2)

-i

Output as C include file (array definition)

-l _len_

Stop after outputting len bytes

-p, -ps, -plain

Plain hexdump style (continuous hex without addresses)

-r, -revert

Reverse operation: convert hexdump to binary

-s _seek_

Start at specified offset in file

-u

Use uppercase hexadecimal letters

-e

Little-endian dump (group bytes are reversed)