Provided by: ntp_4.2.6.p3+dfsg-1ubuntu3_amd64 bug


       ntptrace - trace a chain of NTP servers back to the primary source


       ntptrace [ -n ] [ server ]


       ntptrace  determines  where a given Network Time Protocol (NTP) server gets its time from,
       and follows the chain of NTP servers back  to  their  master  time  source.  If  given  no
       arguments, it starts with localhost. Here is an example of the output from ntptrace:

       % ntptrace
       localhost: stratum 4, offset 0.0019529, synch distance 0.144135 stratum 2, offset 0.0124263, synch distance 0.115784 stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'

       On  each  line,  the fields are (left to right): the host name, the host stratum, the time
       offset between that host and the local host (as measured by ntptrace; this is  why  it  is
       not  always  zero  for  "localhost"),  the  host  synchronization  distance, and (only for
       stratum-1 servers) the reference clock ID. All times are given in seconds. Note  that  the
       stratum  is the server hop count to the primary source, while the synchronization distance
       is the estimated error relative to the primary source. These terms are  precisely  defined
       in RFC-1305.


       -d     Turns on some debugging output.

       -n     Turns  off  the  printing of host names; instead, host IP addresses are given. This
              may be useful if a nameserver is down.

       -r retries
              Sets the number of retransmission attempts for each host (default = 5).

       -t timeout
              Sets the retransmission timeout (in seconds) (default = 2).

       -v     Prints verbose information about the NTP servers.


       This program makes no attempt to improve accuracy by doing multiple samples.