Determining daylight savings changes on BSD
Dan Busarow
dan at dpcsys.com
Thu Feb 22 17:16:14 UTC 2007
On Feb 22, 2007, at 9:33 AM, Lisa Casey wrote:
> Hi,
>
> I just read through this entire thread and I have a couple of
> questions. I have several FreeBSD 5.4 systems. I did the date -r
> commands as suggested on one of these systems and it doesn't appear
> to switch over to daylight savings time on Sunday March 11 at 2 AM.
>
> I looked in /usr/ports/misc but there isn't a zoneinfo port (on
> this system). I searched a bit and found this:
Lisa,
If you can't use the ports to update your time zone files here is the
manual procedure.
1. create a new directory and cd into it
e.g. # mkdir myzoneinfo; cd myzoneinfo
2. # fetch ftp://elsie.nci.nih.gov/pub/tzdata2007b.tar.gz
3. # tar -zxvf tzdata2007b.tar.gz
4. you will now have a bunch of files in the directory extracted from
tzdata2007b.
you need to edit zone.tab and comment out these lines
#AX +6006+01957 Europe/Mariehamn
#GG +4927-00232 Europe/Guernsey
#IM +5409-00428 Europe/Isle_of_Man
#JE +4912-00207 Europe/Jersey
#ME +4226+01916 Europe/Podgorica
#RS +4450+02030 Europe/Belgrade
#TL -0833+12535 Asia/Dili
5. run this command
# zic -d ./zoneinfo -p America/Los_Angeles -m 0644 -y ./yearistype \
africa antarctica asia australasia etcetera europe \
factory northamerica southamerica systemv
that's all one long line
the zic command will create a new directory named zoneinfo and
fill it with the new zoneinfo files. You can compare it to
/usr/share/zoneinfo
6. install the new files by running
# cp -R -p ./zoneinfo/ /usr/share/zoneinfo
# cp ./zone.tab /usr/share/zoneinfo
# tzsetup
7. to verify that all went well run
# zdump -v /etc/localtime | grep 2007
your should get
/etc/localtime Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 01:59:59
2007 PST isdst=0 gmtoff=-28800
/etc/localtime Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 03:00:00
2007 PDT isdst=1 gmtoff=-25200
/etc/localtime Sun Nov 4 08:59:59 2007 UTC = Sun Nov 4 01:59:59
2007 PDT isdst=1 gmtoff=-25200
/etc/localtime Sun Nov 4 09:00:00 2007 UTC = Sun Nov 4 01:00:00
2007 PST isdst=0 gmtoff=-28800
I've done this on 1/2 dozen older 4.x and 5.x servers and it works fine.
Dan
>
> radius# find / -name zoneinfo -print
> /usr/share/zoneinfo
> /usr/compat/linux/usr/share/zoneinfo
> radius# find / -name tzsetup -print
> /usr/sbin/tzsetup
>
> Here's my question. tzsetup seems to already be on this system. I
> have not used it before, so am unfamiliar with it. Can I just run
> that now and make whatever changes are necessary to fix this system
> so that it recognises daylight savings changes? Or am I going to
> have to download some updated zone files first? In this thread,
> someone suggested doing the following:
>
> cd /usr/src/share/zoneinfo
> fetch ftp://elsie.nci.nih.gov/pub/tzdata2007a.tar.gz
> tar -zxvf tzdata2007a.tar.gz
> make
> make install
>
> cp -f /usr/share/zoneinfo/America/Los_Angeles
> /etc/localtime
> chmod 444 /etc/localtime
>
> I have attempted that, but when I unzip/untar tzdata2007b.tar.gz
> (there isn't an "a" file there anymore, just the "b" one), I get
> several files but there is no target for the make command.
>
> Are there any special considerations any of you might be aware of
> depending on what function my freebsd servers are serving? One does
> radius authentication using Free Radius, another is our web server
> (Apache2) and primary DNS (Bind 9), a third is a mail server
> (Sendmail).
>
> I'm sorry - I'm just kinda confused as to how I ought to handle
> this issue.
>
> Thanks,
>
> Lisa Casey
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