There could be many issues with the system time is not in sync with the actual time. Especially in places where the jobs run for different applications including PeopleSoft and other application jobs integrated with PeopleSoft jobs using tools like CONTROL-M, the requirement to have the server times synced is very important.  Else the processes will not start and run as planned. It is more critical if your managing global system and it has been accessed globally at different time zones.

Here is the simple and easiest way to set this up.The below commands would work on CentOS Linux and Red Hat Enterprise Linux. [Need root access]

 RHEL:

• 1. Install the NTP package if it is not already installed. Check if you have it installed already. Mostly it is installed. [command: rpm –q ntp]:
• # yum install ntp
• 2. To have the NTP service started at boot time:
• # chkconfig --levels 235 ntpd on
• 3. Specify the NTP server you’ll be synchronizing with:
• # ntpdate 0.pool.ntp.org
• 4. Start the NTP service:
• # service ntpd start

Visit http://support.ntp.org/bin/view/Servers/NTPPoolServers and find the list of public ntp servers which can be synced with in your time zone.

NTP configurations are stored in /ete/ntp.conf. Check this for more customization and options of more secondary NTP servers.

 Solaris 9:

• # ntpdate -q 0.pool.ntp.org     -- to check if there is no permission to access the ntp server
• # /etc/rc2.d/S74xntpd stop      -- to stop the service before changing
• # ntpdate -b 0.pool.ntp.org      -- to set the server
• # /etc/rc2.d/S74xntpd start       -- to start the service
• # ntpq -p                                     -- this command will check if it is set properly
•      remote           refid      st t when poll reach   delay   offset    disp
  ==============================================================================
   hatch.dayww.net time-A.timefreq  2 u   31   64    3    41.43  -78.815 7876.13
   druid.storyinme navobs1.gatech.  2 u   31   64    3    71.35  -83.814 7877.24
  

config file for Solaris /etc/inet/ntp.conf

Comments (6)

	1. 02-22-2008 09:56
	Is it better to have SNTP instead of NTP client in the system? Guest

Gary T

	2. 09-05-2008 15:41
	If your operations department has its own step time server, you can sync up your server with that server instead of syncing to ntp.org servers.    To check if your local timeserver is the step time server and it is accessible or not, you can run this command:    ntpdate -q This e-mail address is being protected from spam bots, you need JavaScript enabled to view it   You will get repose like this:    server 111.222.33.44, stratum 3, offset 0.098089, delay 0.05698  22 Feb 11:05:58 ntpdate[9767]: adjust time server 111.222.33.33 offset 0.098089 sec    [ It will display the actual IPS of your servers – I’ve scrambled the IP here]    SNTP does not mean it is secured.  SNTP-Simple Network Time Protocol and to know more about SNTP and NTP difference you can check it here or here    --RD http://psadmin.org Registered

RD

	3. 02-26-2008 08:16
	Is there a way to sync up the Windows Servers? Guest

AaronB

	4. 02-26-2008 15:44
	Honestly I haven't done any NTP sync in windows server. I found this link which looks like the right way to do. I cross checked with my Desktop, which was done at my work place, and found it is same. You may want to check with your company's policy to identify the time server.     Also you may want to test it before implementing in any production server.    Here is the link:    http://www.windowsnetworking.com/articles_tutorials/Configuring-Windows-Time-Service.html http://psadmin.org Registered

RD

	5. 05-12-2008 01:07
	In RH linux ntp client sucks, I have done all configuration but ntp not sync to my local ntp server. Guest

Mahmood Sarfraz

	6. 05-13-2008 16:22
	I have done that in more than 10 boxes and did not have any issue.    Can you try with any of the pool.ntp.org and check? Might be the issue is with your local ntp server.  Sometime access permission might be an issue. http://psadmin.org Registered

RD

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