When you try to login an EVK board from a host PC via ssh from ethernet, you may experience such screnario:
Last login: Thu Jan 1 00:01:31 1970 from XXXXXXX
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for root
Password for root changed by root
Connection to 10.X.Y.Z closed.
Retry again is still the same and the EVK can never be login by ssh.
The reason is the EVK does not have a coin-cell battery to keep its real time clock and date is always reset to "Thu Jan 1 00:00:00 1970" after power on. By setting the correct date to the EVK, this problem can be solved.