I have two questions to ask:
1) Windows2000 has "active directory" as one of its greatest features. Does it have a counterpart under UNIX/Linux systems? if not, what does a *NIX system use?
2) i found the windows way of assigning permissions confusing. under *nix, there are only 3 attributes: read, write and execute. but under windows2000, we have: read, write, read and execute, modify and full control! is there an easy way to memorizing these two permission systems?