UTC引發時區配置和Linux系統時間和bios時間問題

標籤：0.00   oca   安裝   number   ubuntu   was   ati   override   作業系統   

在安裝Linux作業系統時，有一個選項是UTC，預設是勾上的。系統安裝好後會把BIOS時間當成UTC標準時間，然後再根據時區調整系統時間。所以會發生明明時區設定正確，時間卻不正確的情況。所以安裝時，最好是取消那個勾。

 

如果已經裝好，可以通過修改設定檔的方式修改。

redhat系統 修改/etc/adjtime第三行為LOCAL

[[email protected] ~]# vim /etc/adjtime

-0.098726 1524046105 0.000000
1524046105
LOCAL
~

The format of the adjtime file is, in ASCII:

       Line 1: 3 numbers, separated by blanks: 1) systematic drift rate in seconds per  day,  floating
       point decimal; 2) Resulting number of seconds since 1969 UTC of most recent adjustment or cali-
       bration, decimal integer; 3) zero (for compatibility with clock(8)) as a decimal integer.

       Line 2: 1 number: Resulting number of seconds since 1969 UTC of most recent calibration.   Zero
       if  there has been no calibration yet or it is known that any previous calibration is moot (for
       example, because the Hardware Clock has been found, since that calibration, not  to  contain  a
       valid time).  This is a decimal integer.

       Line  3:  "UTC"  or  "LOCAL".  Tells whether the Hardware Clock is set to Coordinated Universal
       Time or local time.  You can always override this value with options  on  the  hwclock  command
       line.

       You can use an adjtime file that was previously used with the clock(8) program with hwclock.

 

 

ubuntu系統

hwclock的時區在/etc/default/rcS檔案中設定，裡面有一個參數UTC，預設值為True，表示使用UTC時 區，如果設定為no，那表示使用osclock的時區

 

UTC引發時區配置和Linux系統時間和bios時間問題