Information Technology Reference
In-Depth Information
Table 16.4
The NIS Maps
(continued)
Keyword
Maps
Description
group
group.bygid
,
group.byname
Group name, group ID (GID), and
member information
hosts
hosts.byaddr
,
hosts.byname
Hostnames and network (IPv4)
addresses
ipnodes
ipnodes.byaddr
,
Hostnames and network (IPv6)
ipnodes.byname
addresses
netgroup
netgroup
,
netgroup.byhost
,
Network groups and members
netgroup.byuser
defined in the domain
netmasks
netmasks.byaddr
Netmasks associated with known
networks
networks
networks.byaddr
,
Networks and their associated names
network.byname
passwd
netid.byname
,
Password information for user
passwd.adjunct.byname
,
accounts
passwd.byname
,
passwd.byuid
protocols
protocols.byname
,
IP protocols used within the domain
protocols.bynumber
rpc
rpc.bynumber
RPC program numbers for RPC serv-
ices used within the domain
services
services.byname
,
IP services and their port numbers
services.byservice
NIS was previously known as the
Yellow Pages
. This is the reason why many of the
NIS files and commands contain the
yp
prefix.
NIS Master and Slave Servers
Each NIS environment, or domain, must have only one NIS master server.
The NIS maps reside on the master server. To provide load distribution and
redundancy, one or more slave servers can be configured. Whenever the NIS
maps are updated on the master server, they are propagated to the slave
servers.
NIS Clients
NIS clients request information contained in the maps from NIS servers.
The clients do not make any distinction between the master server and slave
servers.
