1.首先查看时区：
swfsadmin@swfsubuntu:~$ date -R Tue,17 Dec 2013 18:23:01 +0800
如果要修改时区，执行sudo tzselect
2.选择区域：亚洲
swfsadmin@swfsubuntu:~$ sudo tzselect [sudo] password for swfsadmin: Sorry,try again. [sudo] password for swfsadmin: Please identify a location so that time zone rules can be set correctly. Please select a continent or ocean. 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) none - I want to specify the time zone using the Posix TZ format. #? 5
3.选择国家：中国
Please select a country. 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
4.选择时区：北京时间
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,128)">4) most of Tibet & Xinjiang
5) west Tibet & Xinjiang
#? 1
5.确认验证：
The following information has been given: China east China - Beijing,etc. Therefore TZ='Asia/Shanghai' will be used. Local time is now: Tue Dec 17 22:10 CST 2013. Universal Time is now: Tue Dec 10:10 UTC 2013. Is the above information OK? 1) Yes 2) No #? 1 You can make this change permanent for yourself by appending the line TZ='; 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
6.复制文件到/etc目录下
sudo cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
7.更新时间
sudo ntpdatetime.windows.com
改时间参考：
http://5154091.blog.hexun.com/30735220_d.html
修改时间
sudo date -s MM/DD/YY //修改日期 sudo date -s hh:mm:ss 修改时间
在修改时间以后，修改硬件CMOS的时间
sudo hwclock --systohc 非常重要，如果没有这一步的话，后面时间还是不准
http://www.cnblogs.com/php5/archive/2011/02/15/1955432.html
http://os.51cto.com/art/200908/142234.htm
root@fb9f6ef6c5b3:/usr/local/gitserver# date -R Tue,24 Jan 2017 08:07:34 +0000 root@fb9f6ef6c5b3:/usr/local/gitserver# 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: Tue Jan 24 16:08:19 CST 2017. Universal Time is now: Tue Jan 24 08:08:19 UTC 2017. 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 root@fb9f6ef6c5b3:/usr/local/gitserver# vim ~/.profile root@fb9f6ef6c5b3:/usr/local/gitserver# date -R Tue,24 Jan 2017 08:10:40 +0000 root@fb9f6ef6c5b3:/usr/local/gitserver# date Tue Jan 24 08:10:59 UTC 2017 root@fb9f6ef6c5b3:/usr/local/gitserver# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime root@fb9f6ef6c5b3:/usr/local/gitserver# date -R Tue,24 Jan 2017 16:11:47 +0800
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