Ascii/Hex convert in bash

Question

I\'m now doing it this way:

[root@~]# echo Aa|hexdump -v
0000000 6141 000a                              
0000003
[root@~]# echo -e \"\\x41\\x41\\x41\\x41\"
A         


        

Answer 1

Finally got the correct thing

echo "Hello, world!" | tr -d '\n' | xxd -ps -c 200

Answer 2

Text2Conv="Aa"
for letter in $(echo "$Text2Conv" | sed "s/\(.\)/'\1 /g");do printf '%x' "$letter";done

4161

The trick is using sed to parse the Text2Conv to format we can then seperate anf loop using for.

Answer 3

according to http://mylinuxbook.com/hexdump/ you might use the hexdump format parameter

echo Aa | hexdump -C -e '/1 "%02X"'

will return 4161

to add an extra linefeed at the end, append another formatter.

BUT: the format given above will give multiplier outputs for repetitive characters

$ printf "Hello" | hexdump -e '/1 "%02X"' 
48656C*
6F

instead of

48656c6c6f