Man Page for TIMETOOL
timetool - get time from a time server (and optionally set local time)
timetool [-h <hostname>] [-p <port>] -v|-s
timetool communicates with an Internet time server host using BSD Internet Stream Sockets. It obtains the current system time of the server's system clock time as a long int in units of seconds since the Epoch (end of 1969). Normally the time server is a system that synchronizes to Master Clock time. timetool is designed to be used with timesrv, the host time server's program spawned by inetd. By default, time- tool connects to port 22375 on the U.S. Naval Observa- tory's machine "tick.usno.navy.mil". If your system is in multiuser mode, before setting your system clock with timetool you might want to kill /etc/cron, and restart it after setting local system time. The shell script SET- TIME automates this process and can be safely run from a cronfile. Be aware that some systems have trouble restarting cron and you should test SETTIME before adding it to your cronfile.
# compare your system clock with time server "foo.bar.com" timetool -h foo.bar.com -v # synchronize your system clock with time server "foo.bar.com" timetool -h foo.bar.com -s
timetool was written by Ready-to-Run Software, Inc. 1995
timesrv(1), timetool(1), time(2), stime(2).
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