The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The /etc/nsswitch.conf file configures how
the system uses various databases and name resolution
mechanisms. The first field of entries in this file identifies
the name of the database. The second field defines a list of
resolution mechanisms in the order in which the system attempts
to resolve queries on the database.
The following example hosts definition from
/etc/nsswitch.conf indicates that the system
first attempts to resolve host names and IP addresses by
querying files (that is,
/etc/hosts) and, if that fails, next by
querying a DNS server, and last of all, by querying NIS+ (NIS
version 3) :
hosts: files dns nisplus
For more information, see the
nsswitch.conf(5) manual page.