ubuntu更改系统时区和jvm时区

ubuntu更该系统时区及jvm时区

1. 更改系统时区(东八区)

   1. 进入命令行执行tzselect并按照下面执行

      # tzselect
      Please identify a location so that time zone rules can be set correctly.
      Please select a continent, ocean, "coord", or "TZ".
       1) Africa
       2) Americas
       3) Antarctica
       4) Asia
       5) Atlantic Ocean
       6) Australia
       7) Europe
       8) Indian Ocean
       9) Pacific Ocean
      10) coord - I want to use geographical coordinates.
      11) TZ - I want to specify the time zone using the Posix TZ format.
      #? 4
      Please select a country whose clocks agree with yours.
       1) Afghanistan		  18) Israel		    35) Palestine
       2) Armenia		  19) Japan		    36) Philippines
       3) Azerbaijan		  20) Jordan		    37) Qatar
       4) Bahrain		  21) Kazakhstan	    38) Russia
       5) Bangladesh		  22) Korea (North)	    39) Saudi Arabia
       6) Bhutan		  23) Korea (South)	    40) Singapore
       7) Brunei		  24) Kuwait		    41) Sri Lanka
       8) Cambodia		  25) Kyrgyzstan	    42) Syria
       9) China		  26) Laos		    43) Taiwan
      10) Cyprus		  27) Lebanon		    44) Tajikistan
      11) East Timor		  28) Macau		    45) Thailand
      12) Georgia		  29) Malaysia		    46) Turkmenistan
      13) Hong Kong		  30) Mongolia		    47) United Arab Emirates
      14) India		  31) Myanmar (Burma)	    48) Uzbekistan
      15) Indonesia		  32) Nepal		    49) Vietnam
      16) Iran		  33) Oman		    50) Yemen
      17) Iraq		  34) Pakistan
      #? 9
      Please select one of the following time zone regions.
      1) Beijing Time
      2) Xinjiang Time
      #? 1
      
      The following information has been given:
      
      	China
      	Beijing Time
      
      Therefore TZ='Asia/Shanghai' will be used.
      Selected time is now:	Thu Apr  8 15:58:32 CST 2021.
      Universal Time is now:	Thu Apr  8 07:58:32 UTC 2021.
      Is the above information OK?
      1) Yes
      2) No
      #? 1
      
      You can make this change permanent for yourself by appending the line
      	TZ='Asia/Shanghai'; export TZ
      to the file '.profile' in your home directory; then log out and log in again.
      
      Here is that TZ value again, this time on standard output so that you
      can use the /usr/bin/tzselect command in shell scripts:
      Asia/Shanghai
      

   # cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
   

   3. 然后使用date -R查看是否更换成功

2. 更改JVM时区

   1. 终端执行 dpkg-reconfigure tzdata

   2. # dpkg-reconfigure tzdata
      

   3. 依次选择Asia->Shanghai

      

      

   4. 重启java程序