NTP configuration and Time Zone changing (RHEL 6)

Basic steps to configure the NTP and timezone in the system:

A. Configuration:

Server side configuration:

1. cp /etc/ntp.conf /etc/ntp.conf.bak

2. # vim /etc/ntp.conf

server 127.127.1.0

fudge 127.127.1.0 stratum 10

3. # /etc/init.d/ntpd restart

   # chkconfig ntpd on

  

Clicne side configuration:

1. # vim /etc/ntp.conf

server <server IP>

2. # /etc/init.d/ntpd restart

   # chkconfig ntpd on

Time syncing:

# ntpdate -u <server IP>

# ntpq –p

Useful link: http://aixperts.blogspot.in/2012/11/configuring-ntp-server-without-internet.html

B. Time Zone changing:

1. # date

IST time

2. # rm  –rf   /etc/localtime

3. To change the time zone in the system:

# ln  –s  /usr/share/zoneinfo/UTC  localtime

4. # date

UTC time

5. # ntpdate –u <server IP>

6. To check the status:

# ntpq –p

<will show NTP server name>

# ntpstatus

Will show ‘unsynchronized’ if the time is still not synced, and ‘synchronized’ if the time with the server has been synced.

You need to wait for 15 mins to get the syncing done.