Soooo what will it run on?

Looked all over sitebut not finding info. Have used linux over 25 years. 
But where does it tell the minimum hardware requirements for the latest 
offerings? my file server System of over 20 years died and its hard to 
find any later linux that doesnt need some kind of monster machine to 
run as nice as the old debian  and even ubuntu 6, 8, 9.1 ran on.