How to Check Memory if Single/Dual/Quad Rank

Linux and Unix-Like Red Hat
1

What command in redhat linux to know your memory if
it is single, dual or quad rank.

Anyone?

2

dmidecode may or may not be able to give you more information about the arrangement of your memory sticks.

3

Thanks Corona688.

dmidecode has the arrangement but not the identity of ranking. any idea guys?