Editing Network Time (ntp)



Our ntp servers are:

  Castle 69.55.230.2
  I2B    69.55.229.2


# see if its connected:

::[root@quar1 /vz/private]# '''ntpq -pn'''
::ntpq: read: Connection refused

:<big>not running</big>

<ol start="2">
<li>start it:</li>

[root@quar1 /vz/private]# '''service ntpd start'''<br>
Starting ntpd:   [  OK  ]
</ol>

<ol start="3">
<li>Query the NTP Server to see if it is paired</li>
[root@quar1 /vz/private]#''' ntpq -pn'''
     remote           refid      st t when poll reach   delay   offset jitter<br>10.1.4.5        66.187.233.4     2 u    4   64    1    0.317  876558.   0.000
<br>
</ol>
<ol start="4">
<li>[root@quar1 /vz/private]#''' date'''</li>
Thu Oct 11 10:58:05 PDT 2012
</ol>
:<big>time is 11:13</big>
<span style="color:red">that output from ntpq is deceiving- we're syncing connected. you want to see a * or + next to it (ex on mail):</span>


<ol start="5">
<li>mail /usr/local/www/scripts#''' ntpq -pn'''</li>
</ol>
     remote           refid      st t when poll reach   delay   offset jitter
     ==============================================================================
     *66.187.233.4    .CDMA.           1 u  550 1024  377   75.159   -0.613 0.100
      217.204.76.170  0.0.0.0         16 u    - 1024    0    0.000    0.000 4000.00
      64.112.189.11   0.0.0.0         16 u    - 1024    0    0.000    0.000 4000.00
      66.69.112.130   0.0.0.0         16 u    - 1024    0    0.000    0.000 4000.00
     +80.85.129.25    193.79.237.14    2 u  624 1024  377  147.067   -0.291 0.149

<span style="color:red">(btw, if at least one is not + or * our ENTIRE network is off since all boxes sync to mail.
edit /etc/ntp.conf to add servers)</span>

see: http://doc.ntp.org/4.1.1/ntpq.htm

so its not connecting to our ntpd on mail (10.1.4.5)

and this is likely cause of the large time gap (offset 876558.) so we fix it:

<ol start="6">
<li>[root@quar1 /vz/private]# '''date -s "11:17:00"'''<br>
Thu Oct 11 11:17:00 PDT 2012</li>
</ol>

<ol start="7">
<li>[root@quar1 /vz/private]#''' ntpq -pn'''</li>
</ol>
     remote           refid      st t when poll reach   delay   offset jitter
     ==============================================================================
      10.1.4.5        66.187.233.4     2 u 1029   64    0    0.000    0.000 4000.00

no offset but not connected. give it some time...

<ol start="8">
<li>[root@quar1 /vz/private]#''' sleep 300; ntpq -pn'''</li>
</ol>
     remote           refid      st t when poll reach   delay   offset jitter
     ==============================================================================
     *10.1.4.5        66.187.233.4     2 u   44   64   37    0.304  19234.8 0.649

<span style="color:red"><big>Yay, done.</big></span>