新建一个文件 synctime,内容如下:

#!/bin/sh
#
# mysqld    This shell script takes care of starting and stopping
#       the MySQL subsystem (mysqld).
#
# chkconfig: - 64 36
# description:  MySQL database server.
# processname: mysqld
# config: /etc/my.cnf
# pidfile: /var/run/mysqld/mysqld.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

ntpdate time.nist.gov

添加到开机启动:

chkconfig synctime on