I'm trying to convert "Hello" to
48 65 6c 6c 6f
echo -n "Hello" | od -A n -t x1
echoprogram will provide the string to the next command.
-nflag tells echo to not generate a new line at the end of the "Hello".
odprogram is the "octal dump" program. (We will be provide a flag to tell it to dump it in hexadecimal instead of octal.)
-A nflag is short for
--address-radix=n, with n being short for "none". Without this part, the command would output an ugly numerical address prefix on the left side. This is useful for large dumps, but for a short string it is unnecessary.
-t x1flag is short for
--format=x1, with the x being short for "hexidecimal" and the 1 meaning 1 byte.