-# standard to synch to local machine.
-0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /usr/sbin/sntp -P no -r greendragon
-or
-0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /usr/bin/rdate -s -n greendragon
-# -n is nntp which may not work with govt servers.