Set Timezone Commandline

Set timezone using configuration file

      The timezone configuration file “localtime” is located into “/etc/”directory. It is a symbolic link or a correct timezone file of “/usr/share/zoneinfo/Asia/Calcutta”. The “/usr/share/zoneinfo/” directory contains all pacific and country timezone file.

      Here the example to set the timezone to Calcutta (India) which is located in the Asia directory.

      Process to change timezone:

# cp /ect/localtime /etc/localtime.old

# cat /usr/share/zoneinfo/Asia/Calcutta > /etc/localtime

      or,

# ln -sf /usr/share/zoneinfo/Asia/Calcutta /etc/localtime

# date (Verify the changed timezone)

      Update time with ntp server using Internet. It will synchronize current time with NTP server.

# ntpdate pool.ntp.org

Set timezone using environment variable

      The “tzselect” command provide to select pacific and country location

# tzselect

      Select continent or ocean by prefix number

      Example: 5 for Asia, then select country 14 for India then press 1 for Yes. It display timezone configuration value. Now append the line in the “/etc/profile” file for make the changes permanently and then log out and log in again.

# vim /etc/profile

      Go to bottom line and enter “export TZ=Asia/Kolkata” without quot.

      :wq

# date (Verify the changed timezone)

      Note: For change timezone graphically, use “system-config-date” command and select timezone tab on the top of the window.