Thứ Hai, 6 tháng 5, 2013

How to Change the Timezone in Linux

Change the Timezone in Linux

Most modern Linux distributions have user-friendly programs to set the timezone, often accessible through the program menus or right-clicking the clock in a desktop environment such as KDE or GNOME. Failing that it's possible to manually change the system timezone in Linux in a few short steps.







  1. 1

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

     



  2. 2

    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.


  3. 3

    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.


  4. 4

    If you wish, backup the previous timezone configuration by copying it to a different location. Such as
    mv /etc/localtime  /etc/localtime-old



  5. 5

    Create a symbolic link to the appropriate timezone from /etc/localtime. Example:
    ln -sf /usr/share/zoneinfo/Europe/Amsterdam /etc/localtime 


     


  6. 6

    If you have the utility rdate, update the current system time by executing
    /usr/bin/rdate -s time-a.nist.gov


     


     


  7. 7

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

     


  8. 8

    Set the hardware clock by executing:
    /sbin/hwclock --systohc




 

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