SYNOPSIS

       sntpclock host

DESCRIPTION

       sntpclock  connects  to  an NTP server on host.  host must be a dotted-
       decimal IP address.

       sntpclock prints a 16-byte TAI64NA adjustment that, when added  to  the
       local UNIX clock, will produce the TAI clock on host.  sntpclock limits
       the adjustment to 2 days.

       sntpclock does not bind to port 123; this means that it does  not  need
       to  run  as  root.   Note that some firewalls will not permit sntpclock
       requests.

NOTES

       An NTP timestamp is a count of  non-leap  seconds.   sntpclock  uses  a
       local  leap-second  table  to  convert the NTP timestamp to TAI with an
       epoch of 1970-01-01 00:00:10 TAI.  For a discussion of  the  difference
       between UTC and TAI see http://pobox.com/~djb/proto/utctai.html.

       The current NTP time scale will break down in 2036.

SEE ALSO

       clockspeed(1),  clockadd(1),  clockview(1),  taiclock(1),  leapsecs(3),
       xntpd(8)



                                                                  sntpclock(1)