NFS Services Administrator's Guide

Configuring the Name Service Switch
Default Configuration
Chapter 6276
passwd: compat
group: compat
hosts: dns [NOTFOUND=return] nis [NOTFOUND=return] files
networks: nis [NOTFOUND=return] files
protocols: nis [NOTFOUND=return] files
rpc: nis [NOTFOUND=return] files
publickey: nis [NOTFOUND=return] files
netgroup: nis [NOTFOUND=return] files
automount: files nis
aliases: files nis
services: nis [NOTFOUND=return] files
This configuration uses the +/- syntax in the /etc/passwd and
/etc/group files. The local /etc/passwd or /etc/group file is consulted
first, and when a plus (+) or minus (-) sign is encountered in the file, the
query goes to the NIS database.
This configuration uses BIND (DNS) for host name and IP address
lookups. NIS is consulted only if the local host is not configured to use
BIND. The local /etc/hosts file is consulted only if the local host is not
configured as a DNS or NIS client.