NIS server configuration in linux step by step.

NIS SERVER

Network Information Service

NIS is centralized users authentication service. It maintains centralized login and domain database Such as /etc/passwd /etc/group, /etc/shadow, /etc/services, /etc/host  etc….

NIS Servers can be configured Master and Slave servers for High availability. 

NIS depends on RPC protocol.

Packages :   ypserv
ypbind
yp-tool

Script : /var/yp/Makefile

Services : ypserv
yppasswdd
portmap

Port number : (It uses random port numbers)

Daemon : yppasswdd

Configuration of NIS (Network Information Service) 

Current NIS server  IP is 192.168.0.20 

Step 1: CHECK IP & HOST ENTRIES 

[root@client ~]# ifconfig 

[root@client ~]# netconfig 
[root@client ~]# service network restart [root@client ~]# ping 192.168.0.0 -b 
[root@client ~]# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=nisserver.zoom.com NISDOMAIN=zoom.com 
:wq! 
[root@client ~]# vi /etc/hosts 
127.0.0.1 localhost.localdomain   localhost
192.168.0.1 nisserver.zoom.com nisserver
:wq! 
[root@client ~]# nisdomainname zoom.com 
[root@client ~]# hostname nisserver.zoom.com 
[root@client ~]# hostname 
nisserver.zoom.com 
* NOW LOG OFF & LOG IN *

Step 2 : CHECK & INSTALL THE PACKAGES 
[root@nisserver ~]# rpm -qa  yp* 
or 
[root@nisserver ~]# yum list installed  yp* 

[root@nisserver ~]# yum remove yp* -y 

[root@nisserver ~]# rm -r /var/yp*

Now Install the packages

[root@nisserver ~]# yum  install yp* -y

Step 3) Edit Main Configuration File 

[root@station9 ~]# vi /var/yp/Makefile 

NOPUSH=true ## 23
all:   passwd group hosts \ ## 109
:wq! 
Step 4 ) Start the service 

[root@station9 ~]# service ypserv restart 

Step 5 ) Create NIS maps i.e NIS database 

[root@station9 ~]# /usr/lib/yp/ypinit -m ## -m -->master 

NOTE : NIS database is stored in /var/yp 

Step 6 ) Start the service so that NIS database get's Activated 

[root@station9 ~]# service yppasswdd  restart 

Step 7) Create new users 

[root@station9 ~]# useradd tom 
[root@station9 ~]# useradd joy 
[root@station9 ~]# passwd tom 
[root@station9 ~]# passwd joy 

Step 8) If a new user/group/password's are created or modified, then the NIS database has to be manually updated. 

NOTE : Go to /var/yp  & run a command make [root@station9 ~]# cd /var/yp 
[root@station9 ~]# ls 
[root@station9 ~]# make 

Step 9) NOTE : If a database contents are modified then again  restart services 

[root@station9 ~]# service pyserv restart
[root@station9 ~]# service yppasswdd  restart

Configuration of NFS with NIS 

[root@nisserver ~]# yum install nfs* -y 
[root@nisserver ~]# vi /etc/exports 
/home 192.168.0.0/24(rw,sync)
:wq! 
[root@nisserver ~]# service nfs restart 
[root@nisserver ~]# showmount -e 192.168.0.X ## X is NFS
servers IP 

CLIENT SIDE CONFIGURATION 
Step 1: CHECK IP & HOST ENTRIES 
[root@client ~]# ifconfig 
[root@client ~]# netconfig 
[root@client ~]# service network restart [root@client ~]# ping 192.168.0.0 -b 
[root@client ~]# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=nisclient.zoom.com NISDOMAIN=zoom.com 
:wq! 
[root@client ~]# vi /etc/hosts 

127.0.0.1 localhost.localdomain   localhost
192.168.0.1 nisclient.zoom.com nisclient
:wq! 
[root@client ~]# nisdomainname zoom.com 
[root@client ~]# hostname nisclient.zoom.com 
[root@client ~]# hostname 
nisclient.zoom.com 
* NOW LOG OFF & LOG IN *
Step 2 ) Make the client Machine as Member of NIS-Server 

[root@station20 ~]# authconfig-tui

[root@station20 ~]# ypwhich

[root@station20 ~]# mount 192.168.0.20:/home /home nisserver.zoom.com

[root@station20 ~]#

Now log in as a NIS server user

[root@station20 ~]# su - tom 

[tom@station20 ~]$