Provided by: ntp_4.2.6.p5+dfsg-3ubuntu2.14.04.13_amd64 

NAME
ntp-wait - wait for NTP server to synchronize
SYNOPSIS
ntp-wait [ -f ] [ -n tries ] [ -s sleep ] [ -v ]
DESCRIPTION
ntp-wait waits until the locally running ntpd is in state 4 (synchronized). This could be useful at boot
time, to delay the boot sequence until after "ntpd -g" has set the time.
OPTIONS
-f Force hard failure if state is unknown.
-n tries
Number of tries before giving up (default 1000 = 10min+)
-s sleep
Seconds to sleep between tries (default 6s = 10/min)
-v Be verbose.
Network Time Protocol October 7, 2006 NTPQ(8)