[NTLUG:Discuss] ntpdate -vs- cron

[Mark Bickel]

Why not run xntp as a daemon and then cron just uses the date function
which has been (roughly) synchronised via xntp? Unless your application
needs a fine degree of accuracy and granularity (in which case you may
want to consider using a gps receiver which provides PPS, which will run
serveral hundred to several thousand dollars).

Here's a useful FAQ on NTP:
http://www.eecis.udel.edu/~ntp/ntpfaq/NTP-a-faq.htm

Mark.Bickel at ericsson.com

Egome wrote:

> If I execute /usr/sbin/ntpdate time.nist.gov  from the command line,
> everything works beautifully!
>
> If I try to make a cron job of that command line I get the following error
> message emailed to root..
>
> ntpdate[3103]: the NTP socket is in use, exiting


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