In using i see 2 types of code

#!/usr/bin/sh

and

#!/user/bin/bash

I have Googled this and the opinions vary a lot. The explanation I have seen on most websites is that sh is older than bash, and that there is no real difference.

Does someone know the difference between these and can give a practical example when to use either one of them.

I highly doubt that there is no real difference, because then having to things that do the exact same thing would be just