HowTo Setup ntpd

1. sudo yum install ntp -y
2. /usr/lib/systemd/system/ntdp.service

   [Unit]
   Description=Network Time Service
   After=syslog.target ntpdate.service sntp.service
   [Service]
   Type=forking
   EnvironmentFile=-/etc/sysconfig/ntpd
   ExecStart=/usr/sbin/ntpd -u ntp:ntp $OPTIONS
   PrivateTmp=true
   [Install]
   WantedBy=multi-user.target
   

3. /etc/sysconfig/ntpd
   OPTIONS="-g -q"
4. /etc/systemd/system/andor.service
   After=network-online.target ntpd.service