##/etc/rc.d/init.d/ntpd stop #/usr/sbin/ntpdate -u tick.usno.navy.mil #/usr/sbin/ntpdate -u tock.usno.navy.mil /usr/sbin/ntpdate -u 0.centos.pool.ntp.org /usr/sbin/ntpdate -u 2.centos.pool.ntp.org ##/etc/rc.d/init.d/ntpd start ##/usr/sbin/ntpq -p #chkconfig --level 2345 ntpd on