Linux Box

I know in DOS you do dir /s for the entire system. What is the linux equivalent ?

ls -Ra /

That is LiSt Recursively All files starting with / (the top level).

I’m installing linux mint and I’m installing it along side to windows. I allocated about 100gb of space for linux and windows has about 120gb. How long should this process take?

I have seen it take as long as 5-6 hours.
Don’t worry about it, it should be just fine.