---- [Linux] Linux operating system to set time synchronization

All nodes must be sure that you have installed ntpd (in Step 4 is installed)

 

1. First select a time server as a server.

   Assume selected as node1.sunny.cn server time server.

2.ntp server configuration

  Modify the ntp.conf file:

 vi /etc/ntp.conf

  A total of three modify the contents of the # removed, and modify the network correctly.

  restrict 192.168.2.2  mask 192.168.2.255  nomodify notrap

  The following four server will be # commented out.

#server 0.centos.pool.ntp.org iburst

#server 1.centos.pool.ntp.org iburst

#server 2.centos.pool.ntp.org iburst

#server 3.centos.pool.ntp.org iburst

   Finally, add two sentences:

server 127.127.1.0 #local clock

fudge  127.127.1.0 stratum 10

3. Edit / etc / sysconfig / ntpd file is replaced with the following

vim /etc/sysconfig/ntpd

# Drop root to id 'ntp:ntp' by default.

SYNC_HWCLOCK=yes

OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid -g"

4. Set the correct time, start ntpd service, and set the boot

This step can be ignored

date -s ‘2017-01-01 01:01:01’

Start Serviceservice ntpd start

  Add the following command line to start ntp server in the /etc/rc.local

/etc/init.d/ntpd start

Write crontab task in each child node to be synchronized at 5.root account.

command:

crontab -e

Enter the following: 

 0-59/10 * * * * /usr/sbin/ntpdate node1.sunny.cn

  In this sense the task is synchronized every 10 minutes and node1 time.

6. Perform / usr / sbin / ntpdate node1.sunny.cn time synchronization server immediately.