NTP服务器和客户端的设置及使用(EN版)

     -c   ----->    Specify an alternate configuration file

     -d    ----->   Specify debugging mode. This flag  may  occur
                    multiple times, with each occurrence indicat-
                    ing greater detail of display

     -e             Specify the time (in  seconds)  it  takes  to
                    compute the NTP encryption field on this com-
                    puter

     -f driftfile   Specify the location of the drift file

     -k             Specify the location of the file  which  con-
                    tains the NTP authentication keys

     -l logfile     Specify a log file instead of logging to sys-
                    log

     -m             Listen for multicast messages and synchronize
                    to them if available (requires multicast ker-
                    nel)

     -p  ---->      Specify the name of the file  to  record  the
                    daemon's process id

     -r             Ordinarily, the daemon automatically  compen-
                    sates  for  the  network  delay  between  the
                    broadcast/multicast server and the client; if
                    the  calibration  procedure  fails,  use  the
                    specified default delay (in seconds)