ntp man page on NeXTSTEP

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NTP(8)									NTP(8)

NAME
       ntp - query an ntp clock

SYNOPSIS
       /usr/etc/ntp [-v] [-s] [-f] [-F] hosts...

DESCRIPTION
       ntp  sends an ntp packet to the ntp daemon running on each of the given
       hosts.  A daemon fills in fields of the ntp packet as per RFC-1059  and
       sends  the  packet back.	 ntp then formats and prints the result on the
       standard output.

       The default output shows the delay, offset, and date in ctime() format.

       Options can reset the time of the local system clock.

OPTIONS
       -v     Verbose output,  showing	the  full  contents  of	 received  ntp
	      packets, plus calculated offset, displacement, etc.

       -s     Set  system  time-of-day clock.  Will only happen if time offset
	      is less  than  compiled-in  constant  WAYTOBIG  (currently  1000
	      seconds).	 Will not happen if remote host is unsynchronized.

       -f     Force  setting  system clock regardless of offset.  Must be used
	      with -s option.  Still will not reset clock if remote system  is
	      unsynchronized.

       -F     Automatically synchronize system clock regardless of offset.  It
	      ignores the listed hosts and synchronizes on the basis  of  data
	      stored  in  NetInfo.   This  option  was	added  to simplify the
	      administration of ntpd.  Assumes -s and -f options.  This allows
	      a	 client	 machine  to  automatically  sync up at boot time.  It
	      still will not reset clock if remote system is unsynchronized.

NTP RESULTS
       The default output for each host looks like this:
	   128.8.10.1: delay:1.845207 offset:-0.358460	Mon Mar 20 08:05:44 1989

       The verbose output for each host looks like this:
	   Packet from: [128.8.10.1]
	   Leap 0, version 1, mode Server, poll 6, precision -10 stratum 1 (WWVB)
	   Synch Distance is 0000.1999	0.099991
	   Synch Dispersion is 0000.0000  0.000000
	   Reference Timestamp is a7bea6c3.88b40000 Tue Mar  7 14:06:43 1989
	   Originate Timestamp is a7bea6d7.d7e6e652 Tue Mar  7 14:07:03 1989
	   Receive Timestamp is	  a7bea6d7.cf1a0000 Tue Mar  7 14:07:03 1989
	   Transmit Timestamp is  a7bea6d8.0ccc0000 Tue Mar  7 14:07:04 1989
	   Input Timestamp is	  a7bea6d8.1a77e5ea Tue Mar  7 14:07:04 1989
	   umd1: delay:0.019028 offset:-0.043890  Tue Mar  7 14:07:04 1989
	     The various fields are interpreted as follows:

       Packet from: [address]
	      The address that this ntp packet was received from.

       Leap indicator: n
	      The leap second indicator.  Non-zero if there is to  be  a  leap
	      second added or subtracted at the new year.

       Status: n

       Stratum: n (source)
	      The  stratum  of	the clock in the NTP hierarchy, along with the
	      source of the clock, either the name  of	a  reference  standard
	      (such as WWVB or GOES) or the Internet address of the clock that
	      this clock is derived from.

       Poll = n
	      The desired poll rate of the peer.

       Precision = exponent (dec)
	      The claimed precision of the clock, in seconds.

       Synchronizing Dist is ???

       Synchronizing Dispersion is ???

       The next five timestamps are given as NTP fixed-point values,  in  both
       hexadecimal and ctime(3).  These are set either by this ntp process, or
       by the server we are querying.

       Reference Timestamp is hex-timestamp  ctime string
	      The last time the server clock was adjusted. (remote time)

       Originate Timestamp is hex-timestamp  ctime string
	      When the ntp request  was	 transmitted  by  us  to  the  server.
	      (local time)

       Receive Timestamp is   hex-timestamp  ctime string
	      When the ntp request was received at the server.	(remote time)

       Transmit Timestamp is  hex-timestamp  ctime string
	      When  the	 ntp  response was transmitted by the server.  (remote
	      time)

       Input Timestamp is     hex-timestamp  ctime string
	      When the ntp response was received by us.	 (local time)

       hostname: delay:time offset:time
	      The summary of the results of the query, giving the hostname  of
	      the  responding  clock  (from  the command line), the round-trip
	      delay, and the offset between the two clocks (assuming symmetric
	      round-trip times).

BUGS
       Using ntp with the current host will show inaccurate results.

       Probably	  a   few   others.    Report	bugs   to   Louis  A.  Mamokos
       (louie@trantor.umd.edu).

SEE ALSO
       ntpd(8), ntpdc(8)
       RFC-1059 Network Time Protocol(1), Mills, D.L.

				 30 July 1988				NTP(8)
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