[Help-bash] How random is $RANDOM?

[Peng Yu]

Let's say two bash processes call $RANDOM at the exact same time. Will
the results be the same? Or the results will be different.

Also, is the low bits of $RANDOM more random or the high bits of
$RANDOM more random. I see examples using $RANDOM%n to map the random
number to a smaller range. But my understanding in other random
numbers is that the high bits are more random and using the modulus is
discouraged. I am not sure what is the recommended usage of $RANDOM to
map it to a smaller range. Does anybody know the best use of $RANDOM
in this case? Thanks.

-- 
Regards,
Peng