> Everytime we switch from winter to summer or summer to wintertime, the time 
> in my Linux OS RH5 enterprise
> Isn?t right. Do you have any suggestion about this problem and how to get the 
> right time
> automatically. I ggogled a lot, but I cannot get my finger on it.

Dear Mari,

The system time in Linux (and other Unix like systems) is represented
as seconds since 1970-01-01 00:00:00 GMT. This depends neither on
time zones nor summer time. System administrator should almost never
touch system clock.

Human readable time is converted from system time on the fly when 
requested by some user space program. This happends according to
the TZ environment variable of the given process.

E.g. /bin/ls produces different results if I change TZ variable:

$ TZ=Europe/Amsterdam   ls -l --full-time /etc/passwd
-rw-r--r-- 1 root root 1921 2008-10-25 15:15:21.000000000 +0200 /etc/passwd
$ TZ=Asia/Tokyo         ls -l --full-time /etc/passwd
-rw-r--r-- 1 root root 1921 2008-10-25 22:15:21.000000000 +0900 /etc/passwd
$ TZ=America/Montevideo ls -l --full-time /etc/passwd
-rw-r--r-- 1 root root 1921 2008-10-25 11:15:21.000000000 -0200 /etc/passwd
$ 

Regards

Gabor
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