Configure NTP date-time synchronization on Linux

Configure NTP time synchronization on Linux with a break operation step, sorted as follows:

1. Install packages (on server and client):

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Yum Install NTP

2. Server-side configuration
For example:
First, the server IP address is set to: 192.168.146.110

Modifying the NTP configuration file

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Vim/etc/ntp.conf Server 0.redhat.pool.ntp.org//set up Superior servers Restrict 192.168.146.0 mask 255.255.255.0 nomodify//Set which client machines can be synchronized with the NTP server Manually correct one time before starting the NTP service Ntpdate 0.redhat.pool.ntp.org Service NTPD Restart Chkconfig ntpd on View NTP service status Netstat-ln | grep 123 Ntpstat

3. Client Configuration:

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Ntpdate 192.168.146.110//sync time with NTP server

or synchronize periodically

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crontab  -E */5 * * * */usr/sbin/ntpdate -u 192.168.146.110    //sync every five minutes    restart Cron D Service/etc/init.d/crond Restart ntpq-p//view sync status