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Each NIS domain must have one, and only one, master server.
After the NIS network is set up, any changes to the maps must be made on the master server.
Additionally, NIS clients that are bound to the slave server will be querying inconsistent data and receiving unexpected results.
Creating NIS maps is described in more detail later in this chapter in the "Configuring an NIS Master Server" section. They are described in Table 12.5, including the corresponding file that is used to create each of them.
For example, the names and addresses of systems are stored in two maps: Always make the maps on the master server and never on a slave server.
If you run make on a slave server, the maps will be generated from data in the slave server's local files and will be inconsistent with the rest of the domain.