Re: Updating hardware clock from cron

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



John R Pierce wrote:
> On 03/04/11 12:40 PM, Matt wrote:
>>
>> I add this to /etc/rc.local
>>
>> /usr/sbin/ntpdate us.pool.ntp.org
>>
>> Sets the clock on start up.  Might run it by cron once a month or so
>> too.
>
> thats just the wrong way to go about it.  if your clock is running fast,
> your cronjob will set it backwards, which will cause some interesting
> anomalies in anything time based, could cause a cronjob to trigger
> twice, funny timestamps in emails, etc.
>
> just setup NTP and forget about it, and it will always work right,
> unless your system is really badly broken, whereupon, it would be better
> to fix it than to continue to hack around like this.

Yup. And if you look in your logs, if the system is gracefully shut down,
it syncs the hardware clock with the system time.

         mark

_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos


[Index of Archives]     [CentOS]     [CentOS Announce]     [CentOS Development]     [CentOS ARM Devel]     [CentOS Docs]     [CentOS Virtualization]     [Carrier Grade Linux]     [Linux Media]     [Asterisk]     [DCCP]     [Netdev]     [Xorg]     [Linux USB]
  Powered by Linux