timesync man page on Plan9

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TIMESYNC(8)							   TIMESYNC(8)

NAME
       timesync - synchronize the system clock to a time source

SYNOPSIS
       aux/timesync [ -a accuracy ] [ -S stratum ] [ -s netroot ] [ -frnDdLilG
       ] [ timeserver ]

DESCRIPTION
       Aux/timesync synchronizes the system clock to a time source, by default
       a file server.  The options are:

       -f     synchronize  to  a  file	server.	 If timeserver is missing, use
	      /srv/boot.

       -r     synchronize to the local real time clock, #r/rtc.

       -L     used with -r to indicate the real time clock is  in  local  time
	      rather  than  GMT.  This is useful on PCs that also run the Win‐
	      dows OS.

       -n     synchronize to an NTP server.  If timeserver  is	missing,  dial
	      the server udp!$ntp!ntp.

       -D     print debugging to standard error

       -d     put file containing last determined clock frequency in directory
	      dir, default /tmp.

       -i     stands for impotent.  Timesync announces what it	would  do  but
	      doesn't  do  it.	 This  is  useful  for tracking alternate time
	      sources.

       -a     specifies the accuracy in nanoseconds to which the clock	should
	      be  synchronized.	 This determines how often the reference clock
	      is accessed.

       -G     causes timesync to use a gps server (see	gpsfs(8))  as  a  time
	      source.

       -s     causes  timesync	to  listen for UDP NTP requests on the network
	      rooted at netroot.  Up to 4 -s options are allowed.

       -S     sets the stratum number to stratum.

       -l     turns on logging to /sys/log/timesync.

FILES
       /tmp/ts.<sysname>.<type>.timeserver
	      where the last frequency guess is kept

       /sys/log/timesync
	      log file

SOURCE
       /sys/src/cmd/aux/timesync.c

BUGS
       Only works with IPv4.

								   TIMESYNC(8)
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