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Full Discussion: Daylight savings patch for Linux?
Operating Systems Linux Daylight savings patch for Linux? Post 302109086 by mr_manny on Friday 2nd of March 2007 05:35:38 PM
Old 03-02-2007
$ rpm -qa | grep -i tzdata
tzdata-2006m-3.el4

if an rpm isn't an option...rpm2cpio and cpio are your friend.

review current DST entries:
[root@myBOX share]# /usr/sbin/zdump -v /etc/localtime | grep 2007
/etc/localtime Sun Apr 1 09:59:59 2007 UTC = Sun Apr 1 01:59:59 2007 PST isdst=0 gmtoff=-28800
/etc/localtime Sun Apr 1 10:00:00 2007 UTC = Sun Apr 1 03:00:00 2007 PDT isdst=1 gmtoff=-25200
/etc/localtime Sun Oct 28 08:59:59 2007 UTC = Sun Oct 28 01:59:59 2007 PDT isdst=1 gmtoff=-25200
/etc/localtime Sun Oct 28 09:00:00 2007 UTC = Sun Oct 28 01:00:00 2007 PST isdst=0 gmtoff=-28800

cd temp2

download tzdata rpm

rpm2cpio < tzdata-2007a-1.noarch.rpm > tzdata.cpio
cpio -i -d < tzdata.cpio

[root@myBOX temp2]# ll
total 1379
-rw-rw-r-- 1 jmcontre jmcontre 948008 Feb 6 15:16 tzdata.cpio
-rw-r--r-- 1 jmcontre jmcontre 454553 Feb 6 15:15 tzdata_2006m-3.el4_noarch.rpm
drwx------ 3 jmcontre jmcontre 1024 Feb 6 15:17 usr

[root@myBOX temp2]# chown -R root:root usr

[root@myBOX temp2]# cd usr/share

[root@myBOX share]# ll
total 3
drwx------ 3 root root 1024 Feb 6 15:17 doc
drwxr-xr-x 21 root root 2048 Feb 6 15:17 zoneinfo

[root@myBOX share]# mv /usr/share/doc /usr/share/docOLD

[root@myBOX share]# mv doc /usr/share/

[root@myBOX share]# mv /usr/share/zoneinfo /usr/share/zoneinfoOLD

[root@myBOX share]# mv zoneinfo /usr/share/

review updated DST entries:

[root@myBOX share]# /usr/sbin/zdump -v /etc/localtime | grep 2007
/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
 

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LEARN ABOUT CENTOS

localtime

LOCALTIME(5)							     localtime							      LOCALTIME(5)

NAME

       localtime - Local timezone configuration file

SYNOPSIS

       /etc/localtime -> ../usr/share/zoneinfo/...

DESCRIPTION

       The /etc/localtime file configures the system-wide timezone of the local system that is used by applications for presentation to the user.
       It should be an absolute or relative symbolic link pointing to /usr/share/zoneinfo/, followed by a timezone identifier such as
       "Europe/Berlin" or "Etc/UTC". The resulting link should lead to the corresponding binary tzfile(5) timezone data for the configured
       timezone.

       Because the timezone identifier is extracted from the symlink target name of /etc/localtime, this file may not be a normal file or
       hardlink.

       The timezone may be overridden for individual programs by using the TZ environment variable. See environ(7).

       You may use timedatectl(1) to change the settings of this file from the command line.

SEE ALSO

       systemd(1), tzset(3), localtime(3), timedatectl(1), systemd-timedated.service(8)

systemd 208															      LOCALTIME(5)
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