SIENOVO
Back to Blog

How to Change Time Zone and Time on Ubuntu

#RSpaceCreatorCommunity#JoinCommunity
  1. First, check the current time zone:

swfsadmin@swfsubuntu:~$ date -R Tue, 17 Dec 2013 18:23:01 +0800

To change the time zone, run sudo tzselect.

  1. Select region: Asia

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
  1. Select country: China

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
  1. Select time zone: Beijing Time

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
  1. Confirm the selection:

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. 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

  1. Copy the time zone file to the /etc directory

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

  1. Update the system time

sudo ntpdate time.windows.com

Reference for manually setting time:

http://5154091.blog.hexun.com/30735220_d.html

To manually set the time:

sudo date -s MM/DD/YY // Set date sudo date -s hh:mm:ss // Set time

After changing the system time, update the hardware CMOS clock:

sudo hwclock --systohc // Very important — without this step, the time will still be incorrect

View original article on CSDN →