How to Change Timezone Linux on RHEL 6/7 and CentOS 6/7

change timezone linux

This post assumed that we will change the System Timezone from the command line without using redhat-config-date.

There are several files and directories that are used for time zones. In RHEL 6 and RHEL 6, there is one directory that very useful to select the appropriate time zone which is /usr/share/zoneinfo directory.

Sometimes we forget to set the correct time zone for the new linux system. This quick steps show how to change timezone on RHEL 6/7 and CentOS 6/7.

/usr/share/zoneinfo – this directory contains the System Timezone files that were compiled by zic. These are binary files and cannot be viewed with a text viewer. The files contain information such as rules about DST. They allow the kernel to convert UTC UNIX time into appropriate local dates and times.

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In order to change the System Timezone of your system you will need to access the file or configuration using root.

How to Change Timezone Linux on RHEL / CentOS

1) How to list all available time zone on RHEL 6 / CentOS 6:

#ls /usr/share/zoneinfo

2) How to list all available time zone on RHEL 7 / CentOS 7:

# timedatectl list-timezones | grep Asia
Asia/Aden
Asia/Almaty
Asia/Amman
..
..
Asia/Kuala_Lumpur

3) How to check timezone in linux RHEL 6 / CentOS 6 :

# cat /etc/sysconfig/clock

4) How to check timezone in linux RHEL 7 / CentOS 7 :

# timedatectl status
      Local time: Thu 2017-01-05 20:00:22 MYT
  Universal time: Thu 2017-01-05 12:00:22 UTC
        RTC time: n/a
       Time zone: Asia/Kuala_Lumpur (MYT, +0800)
     NTP enabled: n/a
NTP synchronized: no
 RTC in local TZ: no
      DST active: n/a

5) How to Change Timezone Linux RHEL 6 / CentOS 6 :

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Edit ZONE= to the following:

# cat /etc/sysconfig/clock
ZONE="Asia/Kuala_Lumpur"

Create a new soft link to your time zone :

# mv /etc/localtime /root/localtime.old
# ln -sf /usr/share/zoneinfo/Asia/Kuala_Lumpur /etc/localtime

6) How to Change Timezone Linux RHEL 7 / CentOS 7 :

timedatectl set-timezone Asia/Kuala_Lumpur

7) How to Display current date and time and timezone :

# date
Thu Jan  5 19:54:38 MYT 2017

Reference :

  • https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/chap-Configuring_the_Date_and_Time.html
  • https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/sect-Date_and_Time_Configuration-Command_Line_Configuration.html
  • http://tecadmin.net/change-timezone-on-centos-and-redhat/

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