How to Change the Timezone in Linux

Steps

1. For ubuntu: [1]http://webonrails.com/2009/07/15/change-timezone-of-ubuntu-machine-from-command-line/

1. Logged in as root, check which timezone your machine is currently using by executing `date`. You'll see something like Mon 17 Jan 2005 12:15:08 PM PST, PST in this case is the current timezone.


2. Change to the directory /usr/share/zoneinfo here you will find a list of time zone regions. Choose the most appropriate region, if you live in Canada or the US this directory is the "America" directory.


3. If you wish, backup the previous timezone configuration by copying it to a different location. Such as
   

   mv /etc/localtime  /etc/localtime-old

   
   


4. Create a symbolic link from the appropiate timezone to /etc/localtime. Example:
   

   ln -sf /usr/share/zoneinfo/Europe/Amsterdam /etc/localtime

   
   


5. If you have the utility rdate, update the current system time by executing
   

   /usr/bin/rdate -s time-a.nist.gov

   
   


6. Set the ZONE entry in the file /etc/sysconfig/clock file (e.g. "America/Los_Angeles")


7. Set the hardware clock by executing:
   

   /sbin/hwclock --systohc

   
   

To change the Time Zone for a particular user

Open your .htaccess file and add the following line.
SetEnv TZ
Eg: SetEnv TZ Europe/London.

How to change the local timezone in Linux

How to change the local timezone in Linux.

It is easy to change the timezone in Linux server. Replace your /etc/localtime file with the appropriate timezone data file from /usr/share/zoneinfo. For example, to set everything to Greenwich Mean Time (GMT), get a shell prompt and replace your /etc/localtime with /usr/share/zoneinfo/GMT by typing the following shell commands:

# date

# cd /etc

# ln -sf /usr/share/zoneinfo/GMT localtime

# date

The first ‘date’ command will show you the current date/time before you change the timezone. The final ‘date’ command shows you current date/time in the timezone that you chose, which in this example is GMT.

There are many timezone data files in the zoneinfo directory and you can use any of them that you wish. To see them all, do:

$ ls /usr/share/zoneinfo

So, symbolic linking /etc/localtime to any of those files, will change the time on server to that timezone.

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