[ale] set time manually on a RHEL 5.1 server

[Jeff Lightner]

Remember that the time is actually recorded in UTC (a/ka Zulu or GMT).


 

The DISPLAY of the time however is controlled globally within the system
by the timezone file (/etc/localtime) or overridden by the TZ variable
if set.

 

You may have the correct UTC time set but the user may be using a
different time zone than you expect.   

 

You can do "echo $TZ" (or have the user do it if you think his variable
is different) to see what value it has.

You can do "zdump -v /etc/localtime" to see what the timezone file
you're using by default is actually setting.  (zdump /etc/localtime will
just give you its current time).

 

Also make I've seen issues (especially on dual boot systems with
Windoze/Linux) where setting the BIOS to use UTC time causes issues
between time seen in Linux/Windoze because both try to update the
hardware clock on shutdown.

 

FYI:  You probably want to use the hwclock command after you have
correct time to insure the hardware clock is correct anyway.

 

________________________________

From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of
Jerry Yu
Sent: Thursday, January 17, 2008 1:29 PM
To: ALE
Subject: [ale] set time manually on a RHEL 5.1 server

 

I need to set the time on a RHEL 5.1 server overseas. It has GMT+1.  No
NTP server available. So, I did 'date -u' on another RHEL 5.1 server
with EST as its time zone, then apply the timestamp on the GMT+1 server
using 'date -u'. 

The time was set. However, the user local to that server reported the
time should be 16:13  instead of 14:13 reported on that server.

Any idea? The only thing I can think of, is that they are not GMT+1.
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