> Suppose I want to have different password files for all the logbooks, but I want to 
> have a single (admin) user that can log in to all logbooks... Do I need to specify 
> the admin data in all the different password files, or can I use one global 
> password file containing the login name and password for the administrator?

I would not recomment different password files for all logbooks, but a common one and
individual "login user" options on the logbooks, like

[global]
Password file = xxx
Admin user = xxx
...

[A]
Options X = ...
Login user = <user1>,<admin user>

[B]
Option X = ...
Login user = <user2>,<admin user>

This has the advantage that there is only a single password file which is easier to
maintain.