ntptrace(1Mtcp)


ntptrace -- trace a chain of NTP hosts back to their master time source

Synopsis

ntptrace [ -vdn ] [ -r retries ] [ -t timeout ] [ server ]

Description

ntptrace determines where a given Network Time Protocol (NTP) server gets its time from by following 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 
server2.bozo.com: stratum 2, offset 0.0124263, synch distance 0.115784 
usnh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB' 
On each line, the fields are (left to right): All times are given in seconds. Synchronization distance is a measure of the accuracy of the clock's time.

Options

-d
turns on debugging output

-n
turns off the printing of host names and gives Host IP addresses instead. This may be necessary 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 information about the NTP servers

Exit codes

None.

References

xntpd(1Mtcp), xntpdc(1Mtcp)

RFC 1035

Notices

This program makes no attempt to improve accuracy by doing multiple samples.
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.