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Date:      Fri, 13 Nov 1998 08:35:21 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Jahanur R Subedar <jahanur@jjsoft.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   ntpdate (was: [Fwd: Cron <root@runner> /usr/sbin/ntpdate chimer.unt.edu www.mit.edu ftp.cdrom.com >/dev/null])
Message-ID:  <19981113083521.P463@freebie.lemis.com>
In-Reply-To: <3649DA43.B0A3FEF@jjsoft.com>; from Jahanur R Subedar on Wed, Nov 11, 1998 at 12:41:07PM -0600
References:  <3649DA43.B0A3FEF@jjsoft.com>

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On Wednesday, 11 November 1998 at 12:41:07 -0600, Jahanur R Subedar wrote:
>
> Hi Greg,
> I am hosting website only on this server.
> I just had a message sent to me by cron to root. This is how it
> looks.
>> Subject: Cron <root@runner> /usr/sbin/ntpdate chimer.unt.edu www.mit.edu
>> ftp.cdrom.com >/dev/null
>> Date: Wed, 11 Nov 1998 12:00:05 -0600 (CST)
>> From: root (Cron Daemon)
>> To: root
>>
>> 11 Nov 12:00:05 ntpdate: can't find host ftp.cdrom.com
>
> I dont undersrtand whats going on. Is somebody accessing my system or
> did somebody set  cron to get something from ftp.cdrom.com.

cron is just the program that started ntpdate, which is what produced
the error message.  It appears that you have told ntpdate to get dates
from a number of unlikely systems (well, chimer.unt.edu might be OK).
Check what you specified for ntp in /etc/rc.conf and compare it with
the man page for ntp.  Also check out
http://www.eecis.udel.edu/~mills/ntp/servers.html for a list of valid
servers.

> Where can I find cron?

$ which cron
/usr/sbin/cron
$ man 8 cron

Greg
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