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BSD 2.11 - man page for ntp (bsd section 8)

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NTP(8)											   NTP(8)

NAME
       ntp - query an ntp clock

SYNOPSIS
       ntp [-v] [-s] [-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-????  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 caluclated
	      offset, displacement, etc.

       -s     Set system time-of-day clock.  Will only happen if time offset is  less  than  com-
	      piled-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.

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 sub-
	      tracted 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 quering.

       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
       RFC-???? Network Time Protocol(1), Dave Mills and ...
       ntpd(8), ntpdc(8)

					   30 July 1988 				   NTP(8)
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