1.首先查看時區：
swfsadmin@swfsubuntu:~$ date -R Tue, 17 Dec 2013 18:23:01 +0800
如果要修改時區，執行sudo tzselect
2.選擇區域：亞洲
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 Ocean10) Pacific Ocean11) none - I want to specify the time zone using the Posix TZ format. #? 5
3.選擇國家：中國
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) Taiwan10) Cyprus 27) Lebanon 44) Tajikistan11) East Timor 28) Macau 45) Thailand12) Georgia 29) Malaysia 46) Turkmenistan13) Hong Kong 30) Mongolia 47) United Arab Emirates14) India 31) Myanmar (Burma) 48) Uzbekistan15) Indonesia 32) Nepal 49) Vietnam16) Iran 33) Oman 50) Yemen17) Iraq 34) Pakistan #? 9
4.選擇時區：北京時間
Please select one of the following time zone regions.1) east China - Beijing, Guangdong, Shanghai, etc.2) Heilongjiang (except Mohe), Jilin3) central China - Sichuan, Yunnan, Guangxi, Shaanxi, Guizhou, etc.4) most of Tibet & Xinjiang5) west Tibet & Xinjiang #? 1
5.確認驗證：
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 17 18:22:10 CST 2013. Universal Time is now: Tue Dec 17 10:22:10 UTC 2013. Is the above information OK?1) Yes2) No #? 1You 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
6.複製文件到/etc目錄下
sudo cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
7.更新時間
sudo ntpdate time.windows.com
改時間參考：
http://5154091.blog.hexun.com/30735220_d.html
修改時間
sudo date -s MM/DD/YY //修改日期sudo date -s hh:mm:ss //修改時間
在修改時間以後，修改硬件CMOS的時間
sudo hwclock --systohc //非常重要，如果沒有這一步的話，後面時間還是不準