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FYI
UTC=false just means the hardware clock is set to local time
arc=false means that the system is using the standard Unix epoch i.e. 00:00:00 1 Jan 1970.
ntp uses UTC and so the time displayed on your servers is based upon the configured timezone. If your servers are kept updated then they should have the current time zone data which can be verified as stated above.
The timezone file being used is /etc/localtime which should be a copy of the America/New_York in your case.
If I run zdump it is what I get, I guess with this the server should update/change the time automatically on November 3, right?
or should I do something else.
Regarding the NTP configuration, is there anything that should be changed?
Quote:
[root@localhost ~]# zdump -v America/New_York |grep 2013
America/New_York Sun Mar 10 06:59:59 2013 UTC = Sun Mar 10 01:59:59 2013 EST isdst=0 gmtoff=-18000
America/New_York Sun Mar 10 07:00:00 2013 UTC = Sun Mar 10 03:00:00 2013 EDT isdst=1 gmtoff=-14400
America/New_York Sun Nov 3 05:59:59 2013 UTC = Sun Nov 3 01:59:59 2013 EDT isdst=1 gmtoff=-14400
America/New_York Sun Nov 3 06:00:00 2013 UTC = Sun Nov 3 01:00:00 2013 EST isdst=0 gmtoff=-18000
Excellent suggestion there, "eggroll." (Love the nick.)
Here's the bottom-line on this:
The NTP daemons will retrieve and calculate a time-value, and set it into the hardware clock. The hardware-clock can be set to GMT, or not. It's up to you, just make sure that all of your systems (esp. in a network) are consistent with one another. (Most applications do not query the hardware directly, anyway.)
The time-zone information file includes cutoff-dates for daylight time. Just be sure (as "eggroll" showed) that your files are up-to-date on this. This will ensure that "what time is it, here and now?" will be returned correctly.
Last edited by sundialsvcs; 10-31-2013 at 06:38 PM.
Actually NTP sets the system clock but the kernel if configured will keep the hardware clock updated every 11 minutes. I believe this is still an accurate statement...
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