Reverse hexadecimal number using shell scripts

Question

I am trying to reverse a hexadecimal number in Bash or any other shell.

For example, I want to reverse the hexadecimal number 4BF8E and the answer should be 71FD2, i.e bitwise reversal.

Answer 1

echo 4BF8E | rev | tr '0123456789ABCDEF' '084C2A6E195D3B7F'

Explanation:

• rev reverses 4BF8E to E8FB4
• tr maps each hexadecimal value to it's bit-reversed value