1. First we have to create the configuration file. In /etc create a file called ntp.conf.  This is the file that you define what servers will be used to sync your time

[root]# cd /etc
[root]# vi ntp.conf

The file should look like this

server 192.5.41.41 prefer
server 128.4.1.2
server 138.39.7.20
server 128.4.1.1
server 128.227.205.3

driftfile /var/db/ntp.drift

2. Setup a cron job to run the command each day

[root]# contab -e

This will open up your cron editor in vi. Add a line like this:

10       18      *       *       *      /usr/sbin/ntptimeset -s

This will run ntptimeset at 6:10 pm every day. The -s parameter tells ntptimeset to go ahead and set the time

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