term% cat index.txt WWV(1) General Commands Manual WWV(1)
NAME
wwv - print and set the date from accurate clock
SYNOPSIS
wwv [ -b -s -f -u ]
DESCRIPTION
Wwv connects to a clock synchronized with radio station WWV. With no
argument it prints the time obtained. It accepts these arguments:
-b Print both the WWV time and the system's current idea of the
time.
-s Set the system's time to agree with WWV. You must be super-
user. The system time cannot be changed by more than 20 min‐
utes.
-f With -s, force the time to be set by WWV even if the local time
disagrees by more than 20 minutes.
-u Report time in UTC rather than local time.
FILES
/usr/adm/wtmp to record time-setting
SEE ALSO
date (1), utmp(5)
BUGS
The WWV clock has been observed to slip sync by an integral number of
minutes or hours from the radio standard.
WWV(1)