How to configure time in cent os

Configuration of time and date in cent os 7

Step 1. install using this command in terminal ->    yum -y install ntp

Step 2. after the client is install type this in command line ->    ntpdate ntp.pagasa.dost.gov.ph

Step 3. to check if the date is change type this in a terminal -> date or timedatectl

Step 4. to view the list of time zone type this in a terminal ->  timedatectl list-timezones | grep -i asia

Step 5. set the time zone type this in a command line ->   timedatectl set-timezone 'Asia/Hong_Kong'

Step 6. now edit the ntp.conf so Linux knows what time servers to sync with on startup type in terminal press control + i to edit -> vi /etc/ntp.conf

Step 7. comment the encircle in line 19 to 23 the terminal by putting # in front of the txt and add this at the bottom of commented file (see attach file for reference)
->  server 1.centos.ntp.pagasa.dost.gov.ph iburst

Step 8 . to save the file press ESC and Control + : and type wq to save

reference link here

http://blog.zwiegnet.com/linux-server/configure-ntp-client-on-centos-7/
http://www.cyberciti.biz/faq/howto-set-date-time-from-linux-command-prompt/