NTP - Revision history

Luc Morissette at 21:00, 12 November 2018

2018-11-12T21:00:05Z

Nicole Tan: Correction for the command to install ntp

2017-03-10T16:30:07Z

Correction for the command to install ntp

Luc Morissette: LM Added link to Services

2016-08-11T13:32:00Z

LM Added link to Services

Luc Morissette: Added tbntpconfig function

2015-07-14T14:46:18Z

Added tbntpconfig function

Cbilodeau: moved How to start NTP to NTP: simplify title

2013-01-07T15:24:00Z

moved How to start NTP to NTP: simplify title

Cbilodeau: change title size

2011-02-11T21:00:45Z

change title size

Cbilodeau: add details

2011-02-11T20:58:39Z

add details

Cbilodeau: fix ntp procedure

2011-02-11T20:56:05Z

fix ntp procedure

Luc Morissette at 21:39, 1 December 2010

2010-12-01T21:39:56Z

Luc Morissette: Modified

2010-12-01T21:38:11Z

Modified

← Older revision		Revision as of 21:00, 12 November 2018
Line 1:		Line 1:

	'''Starting from version 2.9, the timezone can be configured from the web portal in the services section:'''		'''Starting from version 2.9, the timezone can be configured from the web portal in the services section:'''
−	[[Toolpack:System_Settings_B#~~Service~~\|Set NTP servers in Date/Time Services]]	+	[[Toolpack:System_Settings_B#Services\|Set NTP servers in Date/Time Services]]

@@ Line 25: / Line 25: @@
 = Manual configuration <br>  =
 == Installing NTP<br>  ==
-<pre>yum install ntpd
+<pre>yum install ntp
 </pre>
 == Configuring NTP  ==

@@ Line 1: / Line 1: @@
 = System Configuration =
 == Network Time Protocol (NTP) configuration <br>  ==
 On new units, NTP comes pre-installed and activated by default. <br>

@@ Line 1: / Line 1: @@
 == Installing NTP<br>  ==
 <pre>yum install ntpd
@@ Line 36: / Line 55: @@
 You can use the following command to enable NTP:<br>
 <pre>chkconfig ntpd on
 service ntpd start
-−
 </pre>
 == Verify NTP server status<br>  ==

@@ Line 32: / Line 32: @@
 <pre>ntpdate 0.ca.pool.ntp.org
 </pre>
-=== Start NTP<br>  ===
+== Start NTP<br>  ==
 You can use the following command to enable NTP:<br>
@@ Line 43: / Line 43: @@
 To verify the synchronization between the host and the NTP servers:
 <pre>ntpq -p</pre>
 '''Note''': After starting the NTP service, the system requires at least 10 minutes to accept a reference server.
 <br>Example of host synched with barricade.rack9: <br>

@@ Line 1: / Line 1: @@
-== Installing NTP<br> ==
+== Installing NTP<br>  ==
 <pre>yum install ntpd
 </pre>
-== Configuring NTP ==
+== Configuring NTP  ==
-=== Setting the time zone<br> ===
+=== Setting the time zone<br>  ===
 Make sure that the host time zone is set properly. To modify the time zone go [http://kezhong.wordpress.com/2010/03/08/change-timezone-on-centos-5-4/ here]<br>
-=== Setting the DNS&nbsp;server<br> ===
+=== Setting the DNS&nbsp;server<br>  ===
-Make sure your nameserver (DNS) is configured correctly (see [[TBLinux:How_to_change_the_ip_address|Modify the dhcp client configuration]]).<br>
+Make sure your nameserver (DNS) is configured correctly (see [[TBLinux:How to change the ip address|Modify the dhcp client configuration]]).<br>
-=== Modify NTP Server List<br> ===
+=== Modify NTP Server List (Optional)<br>  ===
 Modify your ntp server list
 <pre>vim /etc/ntp.conf</pre>
 Change the server list for those closer to your server. List can be found [http://www.pool.ntp.org/en/ here]<br>Example for Canadian servers: <br>
 <pre>server 0.ca.pool.ntp.org
 server 1.ca.pool.ntp.org
@@ Line 22: / Line 22: @@
 server 3.ca.pool.ntp.org
 </pre>
-=== Synchronize the host date with the NTP&nbsp;server<br> ===
+=== Synchronize the host date with the NTP&nbsp;server<br>  ===
 '''Warning''': This may result is a jump in time of several minutes.<br>
 Use ntpdate to synchronize your server time with a NTP server.<br>
 Example showing a host synchronization with a Canadian server.<br>
 <pre>ntpdate 0.ca.pool.ntp.org
 </pre>
-=== Start NTP<br> ===
+=== Start NTP<br>  ===
 You can use the following command to enable NTP:<br>
@@ Line 39: / Line 39: @@
 </pre>
-== Verify NTP server status<br> ==
+== Verify NTP server status<br>  ==
-To synchronize NTP:
+To verify the synchronization between the host and the NTP servers:
 <pre>ntpq -p</pre>
-<br>Example of host synched with barricade.rack9: <br>
+'''Note''': After starting the NTP service, the system requires at least 10 minutes to accept a reference server.
 <pre>     remote           refid      st t when poll reach   delay   offset  jitter
 ==============================================================================

@@ Line 1: / Line 1: @@
 You can use the following command to check if it's enabled:<br>
-<pre>ntpdate -q</pre><pre>chkconfig --list | grep ntpd</pre>
+<pre> pgrep ntpd
-If all the columns are 'off', then it's not enabled.
+</pre>
-−
 You can use the following command to enable NTP:<br>
 <pre>yum install ntpd
-chkconfig ntpd on</pre>
+chkconfig ntpd on
-Then use the following command to start it:<br>
+service ntpd start
-<pre>service ntpd start
 </pre>
-You can check if the time is in sync using:<br>
+Make sure your nameserver (DNS) is configured&nbsp; correctly (see [http://docs.telcobridges.com/mediawiki/index.php/TBLinux:How_to_change_the_ip_address Modify the dhcp client configuration]).<br>
 <pre>ntpq -p</pre>
 It will display a list of servers and the server which is currently synced should be prepended by a '*'. For example:
@@ Line 18: / Line 22: @@
 +cheezum.mattnor 129.7.1.66       2 u   91 1024  377   45.715    1.504  47.753
 </pre>
-In this case the host's time is synced with arricade.rack9.
+In this case the host's time is synced with barricade.rack9.