ntp server and client configurarion
centos7 ntp server
yum -y install ntp sudo echo <<EOS >> /etc/ntp.conf restrict 192.168.0.0 mask 255.255.255.0 nomodify notrap EOS
centos7 ntp client
yum -y install ntp echo <<EOS >> /etc/ntp.conf server 192.168.0.1 iburst EOS
centos7 ntp start and enable
systemctl start ntpd systemctl status ntpd systemctl enable ntpd systemctl list-unit-files -t service
ntp check
ntpq -p
