1、First modify the following files：
#vim /etc/cron.daily/timeupdate
ntpdate ntp.ubuntu.com

#chmod 755 /etc/cron.daily/timeupdate
#sync
#date ( Type 'date' to check the time )

2、Then booting the board to test：
a).In the case if the board has no cable that will stop at the boot such as：
eth0: device MAC address fa:44:18:40:0c:01

Since the board has no cable ，file system is waiting for assigning IP address，if the board connects the network cable ，the problem will not exit.

b).Assigns MAC Address：
#cat /etc/network/interfaces.d/eth0
auto eht0
allow-hotplug eth0
iface eth0 inet dhcp
hwaddress ether fa:44:18:40:0c:01

dupe reported.