There are different kinds of Linux operating systems and other forks or spin-off OSes too and some of them are less than 10 G of memory. So, in other words, I'm not talking about Ubuntu and some of the different flavors of Ubuntu for example as they can be bigger than 20 G depending on the programs you download. Some of it can be customizable. But Ubuntu is an example of a larger Linux-based OS. But don't let the larger heavyweights scare you away. But of course, Linux is like a grandchild of Unix. So, if the OS is lightweight and if it does the job, then that is good. I've not used Unix OSes yet but I probably should experiment on some of them. I may need to have smaller OSes for older or smaller computers, phones, devices, etc.