How do you start vi when you want to: Edit a fi le named document? Edit a brand new fi le? Open a fi le named document in read-only mode? How do you start Vim in vi-compatibility mode? How do you quit...

How do you start vi when you want to: Edit a fi le named document? Edit a brand new fi le? Open a fi le named document in read-only mode? How do you start Vim in vi-compatibility mode?

How do you quit vi if you have already saved your work? How do you save your work and then quit? How do you quit without saving?