👤
Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Section of Man Page:
Select Man Page Repository:

NetBSD 6.1.5 - man page for ntpd (netbsd section 8)

NTPD(8) 			       Programmer's Manual				  NTPD(8)

NAME
       ntpd - NTP daemon program

SYNOPSIS
       ntpd [-flag [value]]... [--opt-name [[=| ]value]]...

       All arguments must be options.

DESCRIPTION
       This manual page briefly documents the ntpd command.

OPTIONS
       -4, --ipv4
	      Force  IPv4  DNS	name resolution.  This option must not appear in combination with
	      any of the following options: ipv6.

	      Force DNS resolution of following host names on the command line to the IPv4 names-
	      pace.

       -6, --ipv6
	      Force  IPv6  DNS	name resolution.  This option must not appear in combination with
	      any of the following options: ipv4.

	      Force DNS resolution of following host names on the command line to the IPv6 names-
	      pace.

       -a, --authreq
	      Require crypto authentication.  This option must not appear in combination with any
	      of the following options: authnoreq.

	      Require cryptographic authentication for broadcast  client,  multicast  client  and
	      symmetric passive associations.  This is the default.

       -A, --authnoreq
	      Do  not  require crypto authentication.  This option must not appear in combination
	      with any of the following options: authreq.

	      Do not require cryptographic authentication for broadcast client, multicast  client
	      and symmetric passive associations.  This is almost never a good idea.

       -b, --bcastsync
	      Allow us to sync to broadcast servers.

       -c string, --configfile=string
	      configuration file name.

	      The name and path of the configuration file, /etc/ntp.conf by default.

       -d, --debug-level
	      Increase output debug message level.  This option may appear an unlimited number of
	      times.

	      Increase the debugging message output level.

       -D string, --set-debug-level=string
	      Set the output debug message level.  This option may appear an unlimited number  of
	      times.

	      Set the output debugging level.  Can be supplied multiple times, but each overrides
	      the previous value(s).

       -f string, --driftfile=string
	      frequency drift file name.

	      The name and path of the frequency file, /etc/ntp.drift by default.   This  is  the
	      same  operation  as  the	driftfile  driftfile  configuration  specification in the
	      /etc/ntp.conf file.

       -g, --panicgate
	      Allow the first adjustment to be Big.  This option may appear an	unlimited  number
	      of times.

	      Normally,  ntpd  exits  with  a message to the system log if the offset exceeds the
	      panic threshold, which is 1000 s by default. This option allows the time to be  set
	      to  any  value  without  restriction;  however,  this  can happen only once. If the
	      threshold is exceeded after that, ntpd will exit with a message to the system  log.
	      This  option  can be used with the -q and -x options.  See the tinker configuration
	      file directive for other options.

       -i string, --jaildir=string
	      Jail directory.

	      Chroot the server to the directory jaildir This option also implies that the server
	      attempts	to  drop  root	privileges at startup.	You may need to also specify a -u
	      option.  This option is only available if the OS supports adjusting the clock with-
	      out  full  root  privileges.  This option is supported under NetBSD (configure with
	      --enable-clockctl ) and Linux (configure with --enable-linuxcaps ).

       -I iface, --interface=iface
	      Listen on an interface name or address.  This option may appear an unlimited number
	      of times.

	      Open  the  network  address  given,  or all the addresses associated with the given
	      interface name.  This option may appear multiple times.  This option  also  implies
	      not  opening other addresses, except wildcard and localhost.  This option is depre-
	      cated. Please consider using the configuration file  interface  command,	which  is
	      more versatile.

       -k string, --keyfile=string
	      path to symmetric keys.

	      Specify the name and path of the symmetric key file.  /etc/ntp.keys is the default.
	      This is the same operation as the keys keyfile configuration file directive.

       -l string, --logfile=string
	      path to the log file.

	      Specify the name and path of the log file.  The default is  the  system  log  file.
	      This is the same operation as the logfile logfile configuration file directive.

       -L, --novirtualips
	      Do not listen to virtual interfaces.

	      Do  not  listen  to  virtual  interfaces,  defined as those with names containing a
	      colon.  This option is deprecated.  Please consider using  the  configuration  file
	      interface command, which is more versatile.

       -M, --modifymmtimer
	      Modify Multimedia Timer (Windows only).

	      Set  the	Windows Multimedia Timer to highest resolution.  This ensures the resolu-
	      tion does not change while ntpd is running, avoiding timekeeping	glitches  associ-
	      ated with changes.

       -n, --nofork
	      Do not fork.

       -N, --nice
	      Run at high priority.

	      To the extent permitted by the operating system, run ntpd at the highest priority.

       -p string, --pidfile=string
	      path to the PID file.

	      Specify  the  name  and path of the file used to record ntpd's process ID.  This is
	      the same operation as the pidfile pidfile configuration file directive.

       -P number, --priority=number
	      Process priority.  This option takes an integer number as its argument.

	      To the extent permitted  by  the	operating  system,  run  ntpd  at  the	specified
	      sched_setscheduler(SCHED_FIFO) priority.

       -q, --quit
	      Set the time and quit.

	      ntpd  will  exit	just  after the first time the clock is set. This behavior mimics
	      that of the ntpdate program, which is to be retired.  The -g and -x options can  be
	      used  with  this	option.   Note:  The kernel time discipline is disabled with this
	      option.

       -r string, --propagationdelay=string
	      Broadcast/propagation delay.

	      Specify the default propagation delay from the broadcast/multicast server  to  this
	      client. This is necessary only if the delay cannot be computed automatically by the
	      protocol.

       --saveconfigquit=string
	      Save parsed configuration and quit.

	      Cause ntpd to parse its startup configuration file and save an  equivalent  to  the
	      given filename and exit.	This option was designed for automated testing.

       -s string, --statsdir=string
	      Statistics file location.

	      Specify  the  directory path for files created by the statistics facility.  This is
	      the same operation as the statsdir statsdir configuration file directive.

       -t tkey, --trustedkey=tkey
	      Trusted key number.  This option may appear an unlimited number of times.

	      Add a key number to the trusted key list.

       -u string, --user=string
	      Run as userid (or userid:groupid).

	      Specify a user, and optionally a group, to switch to.  This option is  only  avail-
	      able  if	the  OS  supports adjusting the clock without full root privileges.  This
	      option is supported under NetBSD (configure  with  --enable-clockctl  )  and  Linux
	      (configure with --enable-linuxcaps ).

       -U number, --updateinterval=number
	      interval in seconds between scans for new or dropped interfaces.	This option takes
	      an integer number as its argument.

	      Give the time in seconds between two scans for new or dropped interfaces.  For sys-
	      tems  with  routing  socket  support  the scans will be performed shortly after the
	      interface change has been detected by the system.  Use 0 to  disable  scanning.  60
	      seconds is the minimum time between scans.

       --var=nvar
	      make  ARG  an  ntp  variable  (RW).   This option may appear an unlimited number of
	      times.

       --dvar=ndvar
	      make ARG an ntp variable (RW|DEF).  This option may appear an unlimited  number  of
	      times.

       -x, --slew
	      Slew up to 600 seconds.

	      Normally,  the  time is slewed if the offset is less than the step threshold, which
	      is 128 ms by default, and stepped if above the threshold.   This	option	sets  the
	      threshold to 600 s, which is well within the accuracy window to set the clock manu-
	      ally.  Note: Since the slew rate of typical Unix kernels is limited  to  0.5  ms/s,
	      each  second  of	adjustment requires an amortization interval of 2000 s.  Thus, an
	      adjustment as much as 600 s will take almost 14 days to complete.  This option  can
	      be  used	with  the -g and -q options.  See the tinker configuration file directive
	      for other options.  Note: The kernel time discipline is disabled with this option.

       --usepcc
	      Use CPU cycle counter (Windows only).

	      Attempt to substitute the CPU counter for QueryPerformanceCounter.  The CPU counter
	      and  QueryPerformanceCounter are compared, and if they have the same frequency, the
	      CPU counter (RDTSC on x86) is used directly, saving the overhead of a system call.

       --pccfreq=string
	      Force CPU cycle counter use (Windows only).

	      Force substitution the CPU counter for QueryPerformanceCounter.	The  CPU  counter
	      (RDTSC on x86) is used unconditionally with the given frequency (in Hz).

       -?, --help
	      Display extended usage information and exit.

       -!, --more-help
	      Extended usage information passed thru pager.

       - [{v|c|n}], --version[={v|c|n}]
	      Output  version  of  program  and exit.  The default mode is `v', a simple version.
	      The `c' mode will print copyright information and `n' will print the full copyright
	      notice.

OPTION PRESETS
       Any  option  that  is  not  marked as not presettable may be preset by loading values from
       environment variables named:
	 NTPD_<option-name> or NTPD

AUTHOR
       David L. Mills and/or others
       Please send bug reports to:  http://bugs.ntp.org, bugs@ntp.org

       see html/copyright.html

       This manual page was AutoGen-erated from the ntpd option definitions.

( 4.2.6p5)				    2011-12-24					  NTPD(8)


All times are GMT -4. The time now is 01:52 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
×
UNIX.COM Login
Username:
Password:  
Show Password