NTP Server configuration

[root@ns ~]# 

yum -y install ntp

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: ftp.jaist.ac.jp
* base: ftp.jaist.ac.jp
* extras: ftp.jaist.ac.jp
* updates: ftp.jaist.ac.jp
Setting up Install Process
Resolving Dependencies
--> Running transaction check
--> Package ntp.x86_64 0:4.2.2p1-9.el5.centos.2 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

===================================================================
Package

Arch

Version

Repository

Size

===================================================================
Installing:
  ntp 

x86_64

4.2.2p1-9.el5.centos.2

base

1.3 M

Transaction Summary
===================================================================
Install 

1 Package(s)

Update 

0 Package(s)

Remove 

0 Package(s)

Total download size: 1.3 M
Downloading Packages:
(1/1): ntp-4.2.2p1-9.el5.

100% |====================| 1.3 MB 00:00

Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing:   ntp

#################################### [1/1]

Installed: ntp.x86_64 0:4.2.2p1-9.el5.centos.2
Complete!
[root@ns ~]# 

mv /etc/ntp.conf /etc/ntp.conf.bk

[root@ns ~]# 

vi /etc/ntp.conf

# Set servers for synchronizing

server ntp1.jst.mfeed.ad.jp

server ntp2.jst.mfeed.ad.jp

server ntp3.jst.mfeed.ad.jp

[root@ns ~]# 

/etc/rc.d/init.d/ntpd start

Starting ntpd:

[ OK ]

[root@ns ~]# 

chkconfig ntpd on

[root@ns ~]# 

ntpq -p

remote

 

refid

 

st

 

t

 

when

 

poll

 

reach

 

delay

 

offset

 

jitter

==========================================================
ntp1.jst.mfeed.

210.173.160.86

2

 

u

2

64

1

 

21.227

-475.55

0.001

ntp2.jst.mfeed.

210.173.160.86

2

u

 

1

64

1

21.400

 

-475.53

0.001

ntp3.jst.mfeed.

210.173.160.86

2

u

 

-

64

1

22.087

 

-476.08

0.001