Preparing a Slave Server
Before actually running ypinit to create the slave
servers, you should run the domainname command on each
NIS slave to make sure the domain name is consistent with the master server.
Domain names are case-sensitive.
Make sure that the network is working properly before you configure
an NIS slave server. In particular, check to be sure you can use rcp to send files from the master NIS server to NIS slaves.