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

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