timed(8)							      timed(8)

Name
       timed - time server daemon

Syntax
       /usr/etc/timed [ -i | -n network ][ -E ][ -M ][ -t ]

Description
       The  daemon  synchronizes a host's time with the time of other machines
       in a local area network running It is normally  invoked	at  boot  time
       from the file.

       Servers	running slow down the clocks of some machines and speed up the
       clocks of others to bring them all to the average  network  time.   The
       average network time is computed from measurements of clock differences
       with the	 Internet  Communication  Message  Protocol  (ICMP)  timestamp
       request message.

       The  service  provided  by  is based on a master-slave scheme.  When is
       started on a machine, it asks the master for the network time and  sets
       the  host's clock to that time.	After that, it accepts synchronization
       messages periodically sent by the master and calls the  or  routine  to
       perform any corrections on the host's clock.

       It  also	 communicates  with  the command to set the date globally, and
       with the control program, If the machine running	 the  master  crashes,
       then  the  slaves elect a new master from among slaves running with the
       flag set.  The flag provides time synchronization on any attached  net‐
       works where no current master server is detected.  Such a server propa‐
       gates the time computed by the top-level master.	 At least  one	daemon
       on  each	 network  must run with the option set to allow it to become a
       master.

Options
       -E     Overrides the input of slaves.  Use the flag in conjunction with
	      the  flag.   It  specifies  that a master should not average the
	      times of the slaves to calculate the  network  time  but	should
	      distribute the time of its local host as the network time.  This
	      flag allows a master to distribute time to a network  while  the
	      network  time is controlled by an outside agent such as the Net‐
	      work Time Protocol.

       [-i | -n] network

	      -i     Specifies a network to ignore.  Each network that appears
		     as	 an  argument to the flag is added to the list of net‐
		     works that will ignore.  If the flag  is  used,  accesses
		     all  networks  to	which the host is connected except for
		     those networks specified as arguments to the flag.

	      -n     Specifies a network to use.   When	 the  is  started,  it
		     gathers  information  about  all the network devices con‐
		     nected to the local host.	If neither the	flag  nor  the
		     flag  is  used,  tries  to access all the network devices
		     connected to the local host.  The network argument to the
		     flag is the name of a network that should access.

		     If	 the  switch is used, only those networks specified by
		     the flag are accessed.

		     Do not use the and flags together.

       -M     Allows a slave time server to become a master time server if the
	      master  server crashes.  A system running the daemon without the
	      flag set remains a slave.	 The daemon checks for a  master  time
	      server  on  each	network to which it is connected.  It requests
	      synchronization service from the first master server it locates.

       -t     Enables to trace the messages it receives in  the	 file  Tracing
	      can be enabled or disabled with the program.

Restrictions
       Any  system  running with the and options set is eligible to become the
       master, and distribute its local time to all  systems  running  on  its
       network.	  Run  the Network Time Protocol daemon, instead of to prevent
       this behavior.

Files
       Invokes the			  daemon each time the system boots

       Tracing file for

       Log file for master

See Also
       date(1), adjtime(2), gettimeofday(2), networks(5), ntpd(8), timedc(8)
       Introduction to Networking and Distributed System Services

								      timed(8)

Vote for polarhome