[ale] rights and security

[David Hamm]

I need to have 4 groups of users on my Linux Internet server.  The =
groups are as follows.
	sysusers
		users
			employees
				customers
I want the sysusers to have free reign over the other groups files and =
the users only to have free reign over the employees and the customers =
files and the employees to have fre reign over the customers files.  How =
can this be done?  The man pages don't go into any detail on systems =
administration.  Any ideas would be welcomed.

Thanks David