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)



                                                                  snt-
pclock(1)