yum -y install ypserv

- server

ypdomainname server.aplogics.com
vi /var/yp/Makefile
all:  passwd group hosts rpc services netid protocols mail \

vi /var/yp/securenets

255.0.0.0       127.0.0.0
255.255.255.255 192.168.20.139

/usr/lib/yp/ypinit -m

service portmap start
service ypserv start
service yppasswdd start

cd /var/yp
make

- client

yum -y install ypserv

hostname client.aplogics.com

vi /etc/nsswitch.conf

passwd:     files nis
shadow:     files nis
group:      files nis
hosts:      files dns nis

service portmap start
service ypbind on
ypcat passwd
ypcat hosts