How to configure your server to use pool.ntp.org
Edit ntp.conf file, an add the following lines
server pool.ntp.org maxpoll 12
server pool.ntp.org maxpoll 12
server pool.ntp.org maxpoll 12
Please check out http://www.pool.ntp.org
for a list of different time zone servers.
How to verify that your server is synchronized.
Issue the following command ntpq -p or ntpq -pn ( DNS lookup off )
vermeer:~$ ntpq -p
remote refid st t when poll reach delay offset jitter
=========================================================
+daffy.cchmc.org 193.5.216.14 2 u 68 1024 377 158.995 51.220 50.287
*navobs1.oar.net 130.149.17.8 2 u 191 1024 176 79.245 3.589 27.454
-ntp.vermeer.org 131.188.3.222 3 u 766 1024 377 22.302 -2.928 0.508
vermeer:~$ ntpq -pn
remote refid st t when poll reach delay offset jitter
=========================================================
+205.142.198.4 193.5.216.14 2 u 68 1024 377 158.995 51.220 50.287
*198.30.92.2 130.149.17.8 2 u 191 1024 176 79.245 3.589 27.454
-64.44.160.38 131.188.3.222 3 u 766 1024 377 22.302 -2.928 0.508
How to verify that your clients are synchronized.
Issue the following command ntpdc -c monlist or ntpdc -nc monlist ( DNS lookup off ):
ntpq -p
remote address port local address count m ver drop last first
=========================================================
127.0.0.1 40583 127.0.0.1 53273 7 2 0 0 15483660
router1.vermeer.org 123 10.1.20.10 93542 3 3 0 4 15483164
router2.vermeer.org 123 10.1.20.10 68744 3 3 0 5 15483060
router3.vermeer.org 123 10.1.20.10 56228 3 3 0 5 15483127
vermeer:~$ ntpq -p
remote address port local address count m ver drop last first
=========================================================
127.0.0.1 40583 127.0.0.1 53273 7 2 0 0 15483660
10.253.40.38 123 10.1.20.10 93542 3 3 4 15483164
10.11.15.4 123 10.1.20.10 68744 3 3 0 5 15483060
10.10.80.16 123 10.1.20.10 56228 3 3 0 5 15483127
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