NIS+ Transition Guide

Remove the "." from Host Names

Because NIS+ uses dots (periods) to delimit between machine names and domains and between parent and sub-domains, you cannot have a machine (host) name containing a dot. Before converting to NIS+ you must eliminate any dots in your hostnames. You can convert hostname dots to hyphens (-). For example, you cannot have a machine named sales.alpha. You can convert that name to sales-alpha. (See the hosts man page for detailed information on allowable hostnames.)