ubuntu修改时区并同步时间

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ubuntu修改时区并同步时间

修改时区并同步时间

修改时区

  1. 查看时区

    date -R
    Tue, 12 Dec 2017 07:36:14 +0000

  2. 选择时区

    • sudo tzselect

    • 报错（ubuntu 14.04的一个bug）：
      /usr/bin/tzselect: line 171: /home/or/iso3166.tab: No such file or directory
      /usr/bin/tzselect: time zone files are not set up correctly

    • 解决方法
      sudo vim /usr/bin/tzselect
      将 ${TZDIR=pwd} 修改为 ${TZDIR=/usr/share/zoneinfo}

    • 选择区域：亚洲
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    > 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) Arctic Ocean
    >  5) Asia
    >  6) Atlantic Ocean
    >  7) Australia
    >  8) Europe
    >  9) Indian Ocean
    > 10) Pacific Ocean
    > 11) coord - I want to use geographical coordinates.
    > 12) TZ - I want to specify the time zone using the Posix TZ format.
    > #? 5
    >
    • 选择中国
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    > 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
    >
    • 选择中国东部
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    > Please select one of the following time zone regions.
    > 1) east China - Beijing, Guangdong, Shanghai, etc.
    > 2) Heilongjiang (except Mohe), Jilin
    > 3) central China - Sichuan, Yunnan, Guangxi, Shaanxi, Guizhou, etc.
    > 4) most of Tibet & Xinjiang
    > 5) west Tibet & Xinjiang
    > #? 1
    >
    • 确认信息
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    > The following information has been given:
    > 
    > 	China
    > 	east China - Beijing, Guangdong, Shanghai, etc.
    > 
    > Therefore TZ='Asia/Shanghai' will be used.
    > Local time is now:	Tue Dec 12 15:53:53 CST 2017.
    > Universal Time is now:	Tue Dec 12 07:53:53 UTC 2017.
    > Is the above information OK?
    > 1) Yes
    > 2) No
    > #? 1
    >
    • 设置成功
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    > 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
    >
  1. 复制文件到/etc目录下

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

设置系统时间与网络时间同步

  1. 安装ntpdate工具

    sudo apt-get install ntpdate

  2. 设置系统时间与网络时间同步

    sudo ntpdate cn.pool.ntp.org

  3. 将系统时间写入硬件时间

    sudo hwclock –systohc //非常重要，如果没有这一步的话，后面时间还是不准