Very Computer

Sorry if this is the wrong group.. (which one is the right one??)

What's a easy way to automatically switch between daylight savings time
and
normal time.

I would like to set up a cron job & line to add the /etc/rc.d/rc.S
which would handle this for me..

any one done this? could you share what you did?
thanks :)
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|   ||__| |   |   http://umbc.edu/~matthew    quote by:terrell neuage

'ntpdate -s <servername>'

This sets my local machine time (if time diff is not too big).
That was as written in the manual and this is now confirmed :(
I called another time and time was set as it should.
But I will have to work how to handle 1 hour diffs.

Quote:> --
> .-.-..--._|_ _|_  AND SOMETIMES I THINK THAT WE ARE ALL BALLOONS WITH
> | | |.--| |   |   LONG STRINGS SEARCHING FOR SOMETHING TO TIE ON TO.
> |   ||__| |   |   http://umbc.edu/~matthew    quote by:terrell neuage

Quote:>Sorry if this is the wrong group.. (which one is the right one??)

>What's a easy way to automatically switch between daylight savings time
>and
>normal time.

>I would like to set up a cron job & line to add the /etc/rc.d/rc.S
>which would handle this for me..

>any one done this? could you share what you did?
>thanks :)

I woke up this morning, and found that it had happened automatically.

I can't verify at what time "CDT" changed over to "CST," but I rather
suspect that it was at 2am CST...
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% file /etc/localtime
/etc/localtime: symbolic link to ../usr/lib/zoneinfo/GB

The other method is to setenv TZ "GB"  or whatever your timezone is
called. For UK users, if you use GMT then it ignores summer time.

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Quote:>>>>> "Matthew" == Matthew Haycraft writes:

Matthew> I would like to set up a cron job & line to add the /etc/rc.d/rc.S
Matthew> which would handle this for me..

Matthew> any one done this? could you share what you did?

        man zic.
--
        Best regards, -- Boris.

  Matthew> Sorry if this is the wrong group.. (which one is the right
  Matthew> one??)  What's a easy way to automatically switch between
  Matthew> daylight savings time and normal time.

  Matthew> I would like to set up a cron job & line to add the
  Matthew> /etc/rc.d/rc.S which would handle this for me..

Keey the CMOS clock on GMT.   Set the /etc/localtime link correctly.
Then everything takes care of itself.  You can do these tasks either
from the Red Hat control-panel or from the command line.

If you don't know whether or not the CMOS clock is using GMT, just do
"clock -u -w".  That sets the CMOS clock to what the kernel currently
thinks is GMT.  This doesn't work under Linux/Alpha, though.  I
believe you need to use "setclock" on that platform.

I do:

Get today's date, as a template.
Set system time to correct "now" local time.
Have system calculate UTC time for you.
Set system time to "now" UTC time.
Write it to hardware clock.
Upshot: came up with the correct time 27Oct97 ("Fall back").

Before you begin, clock -r should return the correct UTC (not local)
time. /etc/adjtime is set to "0.0 0 0.0". System time is set by
(paraphrased):

 i)    tmp=$(date)                # ie., MST

 ii)   date -s "${corrected_tmp}" # also MST

 iii)  date -u                    # to get utc template

 iv)   date -us "$(date)"         # set system to utc

 v)    clock -w                   # NOT -uw !!

Why not -uw?

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       zcat /usr/doc/timezone/Introduction.gz |*ney | less