ntp-wait (8)

ntp-wait [ -f ] [ -n tries ] [ -s sleep ] [ -v ]

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.

-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.