Linux and Unix Users Group at Virginia Teck Wiki - User contributions [en]

Network Time Protocol

2026-09-25T14:49:38Z

Drakeerv13:

== Syncing your clock to Virginia Tech's time servers ==
Virginia Tech hosts four [[w:Network Time Protocol|Network Time Protocol]] (NTP) servers:

* '''ntp-1.vt.edu''' (198.82.247.51) (2001:468:c80:2101:0:14b:a768:154f)
* '''ntp-2.vt.edu''' (198.82.247.71) (2001:468:c80:4101:0:1b6:a45f:ab40)
* '''ntp-3.vt.edu''' (198.82.247.108) (2001:468:c80:6101:0:111:7c3a:677)
* '''ntp-4.vt.edu''' (198.82.247.131) (2001:468:c80:8101:0:178:d2dd:db75)

The current status of the NTP servers can be found at [https://ntpstats.cns.vt.edu/ cns.vt.edu].

=== Using Gnome ===
# Right click on the clock in the top right hand corner of your desktop and select '''Adjust Date & Time'''.
# You may have to enter your password to continue.
# From the '''Configuration''' drop-down list, select '''Keep synchronized with Internet servers'''.
# You may need to click '''Install NTP support'''.
# Click '''Select Servers'''.
# Type <code>ntp-1.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-2.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-3.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-4.vt.edu</code>
# Click the '''Add''' button.
# Click the '''Close''' button.
# Click the '''Close''' button again.

=== Using ntpd ===
Backup your <code>/etc/ntp.conf</code>:
<pre>
# cp /etc/ntp.conf /etc/ntp.conf.bak
</pre>

Add the following lines to <code>/etc/ntp.conf</code>:
<pre>
server ntp-1.vt.edu
server ntp-2.vt.edu
server ntp-3.vt.edu
server ntp-4.vt.edu
</pre>

=== Using ntpdate ===
Change the contents of <code>/etc/cron.daily/ntpdate</code> to:
<pre>
ntpdate ntp-1.vt.edu ntp-2.vt.edu ntp-3.vt.edu ntp-4.vt.edu
</pre>

=== Using chrony ===
Backup your <code>/etc/chrony/chrony.conf</code>:
<pre>
# cp /etc/chrony/chrony.conf /etc/chrony/chrony.conf.bak
</pre>

Add the following lines to <code>/etc/chrony/chrony.conf</code>:
<pre>
server ntp-1.vt.edu
server ntp-2.vt.edu
server ntp-3.vt.edu
server ntp-4.vt.edu
</pre>

=== Using dnsmasq ===
This is will send the ntp addresses over dhcp.
Add the following line to <code>/etc/dnsmasq.conf</code>:
<pre>
dhcp-option=option:ntp-server,198.82.247.51,198.82.247.71,198.82.247.108,198.82.247.131
</pre>
[[Category:Howtos]]
[[Category:Campus computing resources]]

Network Time Protocol

2026-09-25T14:48:07Z

Drakeerv13: Add NTP Dashboard page

== Syncing your clock to Virginia Tech's time servers ==
Virginia Tech hosts four [[w:Network Time Protocol|Network Time Protocol]] (NTP) servers:

* '''ntp-1.vt.edu''' (198.82.247.51) (2001:468:c80:2101:0:14b:a768:154f)
* '''ntp-2.vt.edu''' (198.82.247.71) (2001:468:c80:4101:0:1b6:a45f:ab40)
* '''ntp-3.vt.edu''' (198.82.247.108) (2001:468:c80:6101:0:111:7c3a:677)
* '''ntp-4.vt.edu''' (198.82.247.131) (2001:468:c80:8101:0:178:d2dd:db75)

The current status of the NTP servers can be found at [https://ntpstats.cns.vt.edu/].

=== Using Gnome ===
# Right click on the clock in the top right hand corner of your desktop and select '''Adjust Date & Time'''.
# You may have to enter your password to continue.
# From the '''Configuration''' drop-down list, select '''Keep synchronized with Internet servers'''.
# You may need to click '''Install NTP support'''.
# Click '''Select Servers'''.
# Type <code>ntp-1.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-2.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-3.vt.edu</code>
# Click the '''Add''' button.
# Type <code>ntp-4.vt.edu</code>
# Click the '''Add''' button.
# Click the '''Close''' button.
# Click the '''Close''' button again.

=== Using ntpd ===
Backup your <code>/etc/ntp.conf</code>:
<pre>
# cp /etc/ntp.conf /etc/ntp.conf.bak
</pre>

Add the following lines to <code>/etc/ntp.conf</code>:
<pre>
server ntp-1.vt.edu
server ntp-2.vt.edu
server ntp-3.vt.edu
server ntp-4.vt.edu
</pre>

=== Using ntpdate ===
Change the contents of <code>/etc/cron.daily/ntpdate</code> to:
<pre>
ntpdate ntp-1.vt.edu ntp-2.vt.edu ntp-3.vt.edu ntp-4.vt.edu
</pre>

=== Using chrony ===
Backup your <code>/etc/chrony/chrony.conf</code>:
<pre>
# cp /etc/chrony/chrony.conf /etc/chrony/chrony.conf.bak
</pre>

Add the following lines to <code>/etc/chrony/chrony.conf</code>:
<pre>
server ntp-1.vt.edu
server ntp-2.vt.edu
server ntp-3.vt.edu
server ntp-4.vt.edu
</pre>

=== Using dnsmasq ===
This is will send the ntp addresses over dhcp.
Add the following line to <code>/etc/dnsmasq.conf</code>:
<pre>
dhcp-option=option:ntp-server,198.82.247.51,198.82.247.71,198.82.247.108,198.82.247.131
</pre>
[[Category:Howtos]]
[[Category:Campus computing resources]]