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timed(8) [bsd man page]

TIMED(8)						      System Manager's Manual							  TIMED(8)

NAME
timed - time server daemon SYNOPSIS
timed [ -t ] [ -M ] [ -n network ] [ -i network ] DESCRIPTION
Timed is the time server daemon and is normally invoked at boot time from the rc(8) file. It synchronizes the host's time with the time of other machines in a local area network running timed(8). These time servers will slow down the clocks of some machines and speed up the clocks of others to bring them to the average network time. The average network time is computed from measurements of clock differences using the ICMP timestamp request message. The service provided by timed is based on a master-slave scheme. When timed(8) is started on a machine, it asks the master for the net- work time and sets the host's clock to that time. After that, it accepts synchronization messages periodically sent by the master and calls adjtime(2) to perform the needed corrections on the host's clock. It also communicates with date(1) in order to set the date globally, and with timedc(8), a timed control program. If the machine running the master crashes, then the slaves will elect a new master from among slaves running with the -M flag. A timed running without the -M flag will remain a slave. The -t flag enables timed to trace the messages it receives in the file /usr/adm/timed.log. Tracing can be turned on or off by the program timedc(8). Timed normally checks for a master time server on each network to which it is connected, except as modified by the options described below. It will request synchronization service from the first master server located. If permitted by the -M flag, it will provide synchronization service on any attached networks on which no current master server was detected. Such a server propagates the time computed by the top-level master. The -n flag, followed by the name of a network which the host is connected to (see networks(5)), overrides the default choice of the network addresses made by the program. Each time the -n flag appears, that network name is added to a list of valid networks. All other networks are ignored. The -i flag, followed by the name of a network to which the host is connected (see networks(5)), overrides the default choice of the network addresses made by the program. Each time the -i flag appears, that network name is added to a list of networks to ignore. All other networks are used by the time daemon. The -n and -i flags are meaningless if used together. FILES
/usr/adm/timed.log tracing file for timed /usr/adm/timed.masterlog log file for master timed SEE ALSO
date(1), adjtime(2), gettimeofday(2), icmp(4P), timedc(8), TSP: The Time Synchronization Protocol for UNIX 4.3BSD, R. Gusella and S. Zatti 4.3 Berkeley Distribution November 17, 1996 TIMED(8)

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TIMEDC(8)						    BSD System Manager's Manual 						 TIMEDC(8)

NAME
timedc -- timed control program SYNOPSIS
timedc [command [argument ...]] DESCRIPTION
The timedc utility is used to control the operation of the timed(8) program. It may be used to: o Measure the differences between machines' clocks, o Find the location where the master time server is running, o Enable or disable tracing of messages received by timed(8), and o Perform various debugging actions. Without any arguments, timedc will prompt for commands from the standard input. If arguments are supplied, timedc interprets the first argu- ment as a command and the remaining arguments as parameters to the command. The standard input may be redirected causing timedc to read com- mands from a file. Commands may be abbreviated; recognized commands are: ? [command ...] help [command ...] Print a short description of each command specified in the argument list, or, if no arguments are given, a list of the recognized commands. clockdiff host ... Compute the differences between the clock of the host machine and the clocks of the machines given as arguments. msite [host ...] Show the master time server for specified host(s). trace { on | off } Enable or disable the tracing of incoming messages to timed in the file /var/log/timed.log. election host1 [host2 ...] Asks the daemon on the target host to reset its "election" timers and to ensure that a time master has been elected. quit Exit from timedc. Other commands may be included for use in testing and debugging timed(8); the help command and the program source may be consulted for details. FILES
/var/log/timed.log tracing file for timed /var/log/timed.masterlog log file for master timed SEE ALSO
date(1), adjtime(2), icmp(4), timed(8) R. Gusella and S. Zatti, TSP: The Time Synchronization Protocol for UNIX 4.3BSD. DIAGNOSTICS
?Ambiguous command abbreviation matches more than one command ?Invalid command no match found ?Privileged command command can be executed by root only HISTORY
The timedc utility appeared in 4.3BSD. BSD
June 6, 1993 BSD

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