Setting the time and date in CENTOS

Sometimes, you may get the following error while trying to sync your Ubuntu server time with the NTP server using "ntpdate" command:

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~# sudo ntpdate pool.ntp.org
5 Dec 01:32:33 ntpdate[21647]: the NTP socket is in use, exiting
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The ntpdate command will not run when the NTP server is running. If you run ntpdate and get a response like "the NTP socket is in use", that means your NTP server is running. Stop it with the command:

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sudo /etc/init.d/ntp stop
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You can now run ntpdate with the server you want to sync against as an argument. For example, to tell ntpdate to try and sync with "pool.ntp.org", run:

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sudo ntpdate pool.ntp.org
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When you're finished testing remember to start NTP back up again:

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sudo /etc/init.d/ntp start
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