ubuntu时间校准

• date 查看当前时间
• 运行tzselect，选择Asia（亚洲）
• 选择China，然后选定北京时间
• 确定
• 复制文件到本地时间内(sudo cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime)

• date 再次查看当前时间

  vagrant@ubuntu-xenial:/data/www/code/nginx+lua$ 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.
  Local time is now:      Wed Jan 26 14:29:07 CST 2022.
  Universal Time is now:  Wed Jan 26 06:29:07 UTC 2022.
  Is the above information OK?
  1) Yes
  2) No
  Please enter a number in range.
  #? 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
  

  在阿里云的ecs上使用第三方软件源的时候发现这个问题 sudo: apt-add-repository: command not found，安装了这个包就可以了

   sudo apt-get install software-properties-common