Hi,

> 1) Can a machine be a client for both nis & nisplus servers i.e. can one
> machine accept logins of both nis & nisplus users

I don't know.
I'd try it, i.e. in /etc/nsswitch.conf:

passwd:     files nisplus nis

> 2) How do I discover if I machine is a client for nis or not?

domainname: returns your domain name

> 3) How do I discover if I machine is a client for nisplus or not?

You can at least check whether it is nis (aka v 2):
ypwhich -V 2

I guess 'nisswitch -V 3' should work in the same way...

> 4) If a machine is a client for a NIS server, how do I discover what's the
> server name?

ypwhich: returns the name of your server (currently bound, I guess)

> 5) If a machine is a client for a NIS+ server, how do I discover what's
> the server name?

nisswich

> 6) Can the same machine point to 2 different NIS servers?

Yes. From man 8 ypbind (describing /etc/yp.conf):

domain nisdomain server hostname
Use server hostname for the domain nisdomain.  You
could  have
more then one entry of this type for a single domain.

> 7) Can the same machine point to 2 different NIS+ servers?

I guess so.

Marc

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