2 linux installations: how many partitions are needed?
I'm thinking about (re)installing debian etch and sid or lenny (whichever is closer to stable, I don't remember now).
In order to do so, how many partitions do I need? Can the root folder of each linux be just a folder in the same partition? (Doing do, I would not need to decide upfront the limit of space I'll have for programs in each linux)
And what about the swap partition? Do I need two of them or they can "share" the same space? I think they can, it's only something that's used when linux is running, it does not really store anything there, is it right?
I think that probably the /home can be the same for both, but I probably cannot use the same user folders, each installation will need its own user folders and files for the hidden folders with configuration files for each program, because they will probably differ at least sometimes even in the more mundane applications, not only in the newest versions.