Setup NTP Server

April 28, 2007, 8:00 pm

Posted by am3n in Linux

From:
http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch24_:_The_
NTP_Server
http://ntp.kim.lipi.go.id/index-en.htm

Below is how to enabling Network Time Protocol Daemon (ntpd) on your linux box (RedHat, CentOS, Fedora)

Make sure you already install ntp package, if not type

CODE:
# yum install ntp

Connecting your linux box to NTP Server. because I am in Indonesia, I am using ntp.kim.lipi.go.id

CODE:
# vi /etc/ntp.conf

server ntp.kim.lipi.go.id

server 0.pool.ntp.org

server 1.pool.ntp.org

server 2.pool.ntp.org

If you want to provide other PCs in your network synchronize their time on to NTP Server add this line, so other PCs dont need consume bandwidth.

CODE:
# vi /etc/ntp.conf

restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

Enabling ntpd run everytime your linux start

CODE:
# chkconfig ntpd on

Start, stopping ntpd

CODE:
# service ntpd start

# service ntpd stop

# service ntpd restart

Verifying ntpd running

CODE:
# pgrep ntpd

Doing An Initial Synchronization. Must be done when ntpd stop

CODE:
# ntpdate -u ntp.kim.lipi.go.id

Determining If NTP Is Synchronized Properly

CODE:
# ntpq -p

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