#!/bin/bash
sudo ln -sf /usr/share/zoneinfo/Asia/Singapore /etc/localtime
echo ‘ZONE="Asia/Singapore"’ > /tmp/timezone

sudo mv /tmp/timezone /etc/sysconfig/clock
sudo chmod 644 /etc/sysconfig/clock
sudo chown root:root /etc/sysconfig/clock

ls -alt /etc/localtime
ls -alt /etc/sysconfig/clock
more /etc/sysconfig/clock
sudo reboot now