Your original time error still remains in the BIOS clock. Furthermore, your system's startup scripts assume that the BIOS clock is running in local time for some reason.
After running ntpdate, you should run "hwclock --systohc --utc" to update the BIOS clock to the correct UTC value. The "--utc" option is important here. The /etc/adjtime file tells the system whether the BIOS clock is supposed to be in local time or UTC time: if this file is wrong, the "--utc" option corrects it automatically.
Unfortunately, some distributions store the information "BIOS clock is running in local/UTC time" in some other location too; you should make sure that both /etc/adjtime and that other location are in agreement, otherwise strange things may happen.
In Linux, the system clock (visible using "date" or "date -u") is created by the OS. It's completely separate from the hardware-based BIOS clock that keeps time when the system is shut down.
Very early in the Linux boot process, the system clock gets its time from tha BIOS clock. If you run ntpd, it will automatically synchronize the BIOS clock to the (NTP-corrected) system clock. If you just use ntpdate, you must synchronize the BIOS clock manually (using the hwclock command) whenever you change the system time.
If your timezone is 6 hours ahead of the GMT time, you should specify it in all Unix systems as GMT-6, not as GMT+6.
You can check the timezone conversion rules using the "zdump" command. It prints time values in UTC and the matching times in the local time of the timezone you specify.
For example:
# zdump -v Etc/GMT+6
Etc/GMT+6 Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 14:45:52 1901 GMT+6 isdst=0 gmtoff=-21600
Etc/GMT+6 Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 14:45:52 1901 GMT+6 isdst=0 gmtoff=-21600
Etc/GMT+6 Mon Jan 18 03:14:07 2038 UTC = Sun Jan 17 21:14:07 2038 GMT+6 isdst=0 gmtoff=-21600
Etc/GMT+6 Tue Jan 19 03:14:07 2038 UTC = Mon Jan 18 21:14:07 2038 GMT+6 isdst=0 gmtoff=-21600
As there are no DST rules in the generic "GMT+6" specification, the command displays the times from the beginning of the known DST data (December 13 1901) to the end of the traditional Unix time_t epoch (Jan 19 2038).
As you can see, "GMT+6" means that the time is 6 hours _behind_ of UTC/GMT, not 6 hours _ahead_.
If you're located in a timezone 6 hours _east_ of Greenwich, you should configure your timezone settings to "GMT-6". This is just how the POSIX timezone designation works: the signed number is what you must add to your local time to get the GMT time, not vice versa.
Reference:
http://www.twinsun.com/tz/tz-link.htm(see the end of the paragraph "Time Notation")
MK
MK
