I don't think the OP is asking about having common credentials on all the systems, but rather not having to enter the credentials when connecting from Linux2 to Linux1 the first time.
This may happen if one uses a domain controller, or ldap or AD for login authentication.
I'm not certain however.
Why recommend a home user run an AD server? I doubt they would want to pay thousands of dollars a year for the license.
( Unless not logging in the first time one connects to a server is worth it to the OP. )
Last edited by jschiwal; 06-06-2008 at 08:39 AM.