ntptrace(8)ntptrace(8)NAMEntptrace - trace a chain of NTP servers back to the primary source
SYNOPSISntptrace [ -n ] [ -m maxhosts ] [ server ]
DESCRIPTIONntptrace is a perl script that uses the ntpq utility program to follow
the chain of NTP servers from a given host back to the primary time
source. For ntptrace to work properly, each of these servers must
implement the NTP Control and Monitoring Protocol specified in RFC 1305
and enable NTP Mode 6 packets.
If given no arguments, ntptrace starts with localhost. Here is an exam‐
ple of the output from ntptrace:
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
usndh.edu: 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 mea‐
sured 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 stra‐
tum is the server hop count to the primary source, while the synchro‐
nization distance is the estimated error relative to the primary
source. These terms are precisely defined in RFC-1305.
OPTIONS-n Turns off the printing of host names; instead, host IP
addresses are given. This may be useful if a nameserver is
This program makes no attempt to improve accuracy by doing multiple
The official HTML documentation.
This file was automatically generated from HTML source.