4 # standard to synch to local machine.
5 0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /usr/sbin/sntp -P no -r greendragon
7 0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /usr/bin/rdate -s -n greendragon
8 # -n is nntp which may not work with govt servers.
10 # one machine on the network uses this version, to synch externally.
11 #0 0,4,8,12,16,20 * * * /usr/sbin/sntp -P no -r time.nist.gov
13 0 0,4,8,12,16,20 * * * /usr/bin/rdate -s time-c.nist.gov