Hexdump: Covert file content to hex array.

 Hexdump can dump file content with hex format,  with parameter -e can format displaying data and it's useful in writing shell.

Example usage:

#> hexdump -v FILE -e '1/1 "0x%02X "'

Test result:

Ref:

  Hexdump man page

  https://man7.org/linux/man-pages/man1/hexdump.1.html