Setup and configure NIS server and NIS client on Fedora Core Linux operating system.

   NIS required only when NIS (Network Information Service) is used, Nis involve only with the user registration etc. only to the server.  The article below the step by step setup and configure the NIS server and NIS client on Fedora operating system, the article also include the setup of portmap, nsswitch and using tools such as ypwhich, ypcat and ypmatch.

Setting of NIS domain server and client

The following line is added to /etc/sysconfig/network.

NISDOMAIN=nisdomain.com

Portmapper should start to operate NIS and NFS.

Portmapper allocates the TCP/UDP port number in the RPC service program.

The main RPC service program

PORTMAPPER,NFS,YPSERV,MOUNTD,YPBIND,YPPASSWDD

Portmap installation

[root@tenouk ~]# mount /dev/cdrom

[root@tenouk ~]# cd /mnt/cdrom/RedHat/RPMS

[root@tenouk ~]# rpm –Uhv portmap-4.0-38.i386.rpm

[root@tenouk ~]# cd /

[root@tenouk ~]# umount /dev/cdrom

Start  and stop portmap service

[root@tenouk ~]# /sbin/service portmap start

[root@tenouk ~]# /sbin/service portmap stop

Confirmation of automatic start of portmap

List the automatic start for portmap service.

[root@tenouk ~]# /sbin/chkconfig --list portmap

Setting of automatic start of portmap.

[root@tenouk ~]# /sbin/chkconfig --level 35 portmap on

Setting of NIS Server

NIS installation

[root@tenouk ~]# mount /dev/cdrom

[root@tenouk ~]# cd /mnt/cdrom/RedHat/RPMS

[root@tenouk ~]# rpm –Uhv ypserv-1.3.12-2.i386.rpm

[root@tenouk ~]# cd /

[root@tenouk ~]# umount /dev/cdrom

Control of ypserv

[root@tenouk ~]# /sbin/service ypserv start

[root@tenouk ~]# /sbin/service ypserv stopt

Setting of automatic start of ypserv

[root@tenouk ~]# /sbin/chkconfig --level 35 ypserv on

Confirmation of automatic start of ypserv

[root@tenouk ~]# /sbin/chkconfig --list ypserv

Ypserv controls the access by /var/yp/securenets.

[root@tenouk ~]# vi /var/yp/securenets

0.0.0.0 0.0.0.0 //The access from all hosts is permitted.

255.255.255.0 192.168.0.0

Ypserv responds only from the host who belongs to 192.168.0.0/24.

NIS Map

   One NIS server or more is necessary to use NIS. NIS data bases contains user information and host information, etc. are put on the NIS server. One of NIS must becomes a master server when two or more NIS servers are prepared, and the remain becomes a slave server.  All information is set on the master server, and the slave server maintains the copy.  The file such as /etc/passwd on the master server is converted into the NIS map.

Example of NIS map

(file) (nis map)

passwd passwd.byname passwd.byuid

hosts hosts.byname hosts.byaddr

Making NIS map

1. Information necessary for the file is written If it is for instance /etc/hosts, the host name and Internet Protocol address are written.

2. The NIS data base is made from these files.

[root@tenouk ~]# cd /var/yp

[root@tenouk ~]# make

Setting of master server

Information in the NIS map is reflected in the mastering server.

[root@tenouk ~]# /usr/lib/yp/ypinit –m

The NIS slave server name is heard when executing.

Besides, when the NIS server does not exist, ends if CTRL+D is input.

Setting of slave server

[root@tenouk ~]# /usr/lib/yp/ypinit –s masterservername

Information in the NIS map is automatically copied from the master server.

Setting of NIS client

The installation process of ypbind and yp-tools.

[root@tenouk ~]# mount /dev/cdrom

[root@tenouk ~]# cd /mnt/cdrom/RedHat/RPMS

[root@tenouk ~]# rpm –Uhv ypbind-1.8-1.i386.rpm

[root@tenouk ~]# rpm –Uhv yp-tools-2.5-1.i386.rpm

[root@tenouk ~]# cd /

[root@tenouk ~]# umount /dev/cdrom

Beginning and stop of ypbind)

[root@tenouk ~]# /sbin/service ypbind start

[root@tenouk ~]# /sbin/service ypbind stop

Setting of automatic start)

[root@tenouk ~]# /sbin/chkconfig --level 35 ypbind on

Confirmation of automatic start

[root@tenouk ~]# /sbin/chkconfig --list ypbind

Specification of nis server

Open and edirt yp.conf file.

[root@tenouk ~]# vi /etc/yp.conf

# /etc/yp.conf - ypbind configuration file

# Valid entries are

#

#domain NISDOMAIN server HOSTNAME

# Use server HOSTNAME for the domain NISDOMAIN.

#

#domain NISDOMAIN broadcast

# Use broadcast on the local net for domain NISDOMAIN

#

#ypserver HOSTNAME

# Use server HOSTNAME for the local domain. The

# IP-address of server must be listed in /etc/hosts.

#

Setting of name service switch

   For instance, information on the user has two of information from /etc/passwd and NIS of each client. Moreover, the host name has three of information from /etc/hosts, NIS, and DNS of each client. By what priority level these information is used specifies the name service switch depending.

[root@tenouk ~]# vi /etc/nsswitch.conf

#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '[NOTFOUND=return]' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
# nisplus or nis+ Use NIS+ (NIS version 3)
# nis or yp Use NIS (NIS version 2), also called YP
# dns Use DNS (Domain Name Service)
# files Use the local files
# db Use the local database (.db) files
# compat Use NIS on compat mode
# hesiod Use Hesiod for user lookups
# [NOTFOUND=return] Stop searching if not found so far
#

# To use db, put the "db" in front of "files" for entries you want to be
# looked up first in the databases
#
# Example:
#passwd: db files nisplus nis
#shadow: db files nisplus nis
#group: db files nisplus nis

passwd: files nisplus
shadow: files nisplus
group: files nisplus

#hosts: db files nisplus nis dns
hosts: files nisplus dns

# Example - obey only what nisplus tells us...
#services: nisplus [NOTFOUND=return] files
#networks: nisplus [NOTFOUND=return] files
#protocols: nisplus [NOTFOUND=return] files
#rpc: nisplus [NOTFOUND=return] files
#ethers: nisplus [NOTFOUND=return] files
#netmasks: nisplus [NOTFOUND=return] files

bootparams: nisplus [NOTFOUND=return] files

ethers: files
netmasks: files
networks: files
protocols: files nisplus
rpc: files
services: files nisplus

netgroup: files nisplus

publickey: nisplus

automount: files nisplus
aliases: files nisplus

Using ypwhich

Ypwhich displays which NIS server to be used.

[root@tenouk ~]# ypwhich

nisdomainA

[root@tenouk ~]#

The list of the data base map is output

[root@tenouk ~]# ypwhich –x

Use "ethers" for map "ethers.byname"

Use "aliases" for map "mail.aliases"

Use "services" for map "services.byname"

Use "protocols" for map "protocols.bynumber"

Use "hosts" for map "hosts.byname"

Use "networks" for map "networks.byaddr"

Use "group" for map "group.byname"

Use "passwd" for map "passwd.byname"

$

Using ypcat

Display the content of the NIS data base output.

Nis passwd

[root@tenouk ~]# ypcat passwd

nfsnobody:!!:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin

kimura:$1$e9/Rybex$xgn0t2ioIJuCjzLOiFIua1:500:500::/home/kimura:/bin/bash

[root@tenouk ~]#

hosts file

[root@tenouk ~]# ypcat hosts

10.10.0.234 nt

127.0.0.1 RedHatA localhost.localdomain localhost

127.0.0.1 RedHatA localhost.localdomain localhost

10.10.0.235 RedHatA

[root@tenouk ~]#

Using ypmatch

A specific key word of the NIS data base is retrieved, and the result is output.

[root@tenouk ~]# ypmatch nt hosts

10.10.0.234 nt

[root@tenouk ~]#

Related:

Setup of NFS server and NFS cilent on Fedora Core system.

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