NTP time synchronization server

Install and use the NTP time synchronization server of ubuntu Server

I. Server

1 apt-Get install NTP

 

2. The service is started by default after installation. if the service is not started, start it.

/Etc/init. d/NTP start

 

3 change VI/etc/NTP. conf to the following

 

Restrict default nomodify notrap noquery

Restrict 127.0.0.1

Restrict 10.91.0.0 mask 255.255.255.0 nomodify

Server 0.pool.ntp.org

Server 1.pool.ntp.org

Server 2.pool.ntp.org

Server 127.127.1.0 # local clock

Fudge 127.127.1.0 stratum 10

 

Driftfile/var/lib/NTP/drift

Broadcastdelay 0.008

Keys/etc/NTP/keys

4. Restart the NTP service.

 

/Etc/init. d/NTP restart

 

Ii. Client

 

1. Use the ntpdate command. If this command does not exist, install apt-Get install NTP first.

 

/Usr/sbin/ntpdate 10.91.0.10 // that is, the synchronization time of the NTP server with the IP address 10.91.0.10

 

2. Set timed synchronization.

 

VI/etc/crontab

30 01 ***/usr/sbin/ntpdate 10.91.0.10

 

The system automatically synchronizes the system time to the NTP server At 01:30 every morning.

 

Of course, the crontab time here refers to the client time, which is equivalent to the NTP server time after synchronization.

NTP time synchronization server