Lines Matching +full:startup +full:- +full:time +full:- +full:ms

2 .  it 1 an-trap
6 .ds B-Font [CB]
7 .ds I-Font [CI]
8 .ds R-Font [CR]
10 .ds B-Font B
11 .ds I-Font I
12 .ds R-Font R
15 .\" EDIT THIS FILE WITH CAUTION (in-mem file)
17 .\" It has been AutoGen-ed May 25, 2024 at 12:04:07 AM by AutoGen 5.18.16
18 .\" From the definitions ntpd-opts.def
19 .\" and the template file agman-cmd.tpl
21 \f\*[B-Font]ntpd\fP
22 \- NTP daemon program
24 \f\*[B-Font]ntpd\fP
26 [\f\*[B-Font]\-flags\f[]]
27 [\f\*[B-Font]\-flag\f[] [\f\*[I-Font]value\f[]]]
28 [\f\*[B-Font]\-\-option-name\f[][[=| ]\f\*[I-Font]value\f[]]]
35 \f\*[B-Font]ntpd\fP
37 and maintains the system time of day in synchronism with Internet
38 standard time servers.
40 Network Time Protocol (NTP) version 4, as defined by RFC-5905,
42 version 3, as defined by RFC-1305, and versions 1
43 and 2, as defined by RFC-1059 and RFC-1119, respectively.
48 \f\*[B-Font]ntpd\fP
49 utility does most computations in 64-bit floating point
50 arithmetic and does relatively clumsy 64-bit fixed point operations
60 \f\*[B-Font]ntpd\fP
63 configuration file at startup time in order to determine the
71 listening to broadcasts at run time.
76 \f\*[B-Font]ntpd\fP,
78 \f\*[B-Font]ntpd\fP
84 \f\*[B-Font]\-c\f[]
90 \f\*[B-Font]ntpd\fP
93 \f\*[B-Font]ntpd\fP
104 \f\*[B-Font]ntpd\fP
108 \f\*[B-Font]ntpd\fP
114 .NOP \f\*[B-Font]\-4\f[], \f\*[B-Font]\-\-ipv4\f[]
122 .NOP \f\*[B-Font]\-6\f[], \f\*[B-Font]\-\-ipv6\f[]
130 .NOP \f\*[B-Font]\-a\f[], \f\*[B-Font]\-\-authreq\f[]
139 .NOP \f\*[B-Font]\-A\f[], \f\*[B-Font]\-\-authnoreq\f[]
148 .NOP \f\*[B-Font]\-b\f[], \f\*[B-Font]\-\-bcastsync\f[]
152 .NOP \f\*[B-Font]\-c\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-configfile\f[]=\f\*[I-Font]string\f[]
159 .NOP \f\*[B-Font]\-d\f[], \f\*[B-Font]\-\-debug\-level\f[]
164 .NOP \f\*[B-Font]\-D\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-set\-debug\-level\f[]=\f\*[I-Font]number\f[]
170 .NOP \f\*[B-Font]\-f\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-driftfile\f[]=\f\*[I-Font]string\f[]
182 .NOP \f\*[B-Font]\-g\f[], \f\*[B-Font]\-\-panicgate\f[]
188 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,
191 \fB-q\fP
193 \fB-x\fP
199 .NOP \f\*[B-Font]\-G\f[], \f\*[B-Font]\-\-force\-step\-once\f[]
204 steps the time if the time offset exceeds the step threshold,
205 which is 128 ms by default, and otherwise slews the time.
207 so the highest time accuracy can be achieved quickly.
208 However, this may also cause the time to be stepped back
210 applications requiring monotonic time are running.
213 .NOP \f\*[B-Font]\-i\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-jaildir\f[]=\f\*[I-Font]string\f[]
219 This option also implies that the server attempts to drop root privileges at startup.
221 \fB-u\fP
226 \fB--enable-clockctl\fP) or Linux (configure with
227 \fB--enable-linuxcaps\fP) or Solaris (configure with \fB--enable-solarisprivs\fP).
229 .NOP \f\*[B-Font]\-I\f[] \f\*[I-Font]iface\f[], \f\*[B-Font]\-\-interface\f[]=\f\*[I-Font]iface\f[]
239 .NOP \f\*[B-Font]\-k\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-keyfile\f[]=\f\*[I-Font]string\f[]
249 .NOP \f\*[B-Font]\-l\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-logfile\f[]=\f\*[I-Font]string\f[]
258 .NOP \f\*[B-Font]\-L\f[], \f\*[B-Font]\-\-novirtualips\f[]
266 .NOP \f\*[B-Font]\-M\f[], \f\*[B-Font]\-\-modifymmtimer\f[]
273 .NOP \f\*[B-Font]\-n\f[], \f\*[B-Font]\-\-nofork\f[]
276 wait-sync.
279 .NOP \f\*[B-Font]\-N\f[], \f\*[B-Font]\-\-nice\f[]
286 .NOP \f\*[B-Font]\-p\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-pidfile\f[]=\f\*[I-Font]string\f[]
296 .NOP \f\*[B-Font]\-P\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-priority\f[]=\f\*[I-Font]number\f[]
306 .NOP \f\*[B-Font]\-q\f[], \f\*[B-Font]\-\-quit\f[]
307 Set the time and quit.
309 saveconfigquit, wait-sync.
317 \fB-g\fP
319 \fB-x\fP
321 Note: The kernel time discipline is disabled with this option.
323 .NOP \f\*[B-Font]\-r\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-propagationdelay\f[]=\f\*[I-Font]string\f[]
328 .NOP \f\*[B-Font]\-\-saveconfigquit\f[]=\f\*[I-Font]string\f[]
331 quit, wait-sync.
333 Cause \fBntpd\fP to parse its startup configuration file and save an
337 .NOP \f\*[B-Font]\-s\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-statsdir\f[]=\f\*[I-Font]string\f[]
345 .NOP \f\*[B-Font]\-t\f[] \f\*[I-Font]tkey\f[], \f\*[B-Font]\-\-trustedkey\f[]=\f\*[I-Font]tkey\f[]
351 .NOP \f\*[B-Font]\-u\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-user\f[]=\f\*[I-Font]string\f[]
358 \fB--enable-clockctl\fP) or Linux (configure with
359 \fB--enable-linuxcaps\fP) or Solaris (configure with \fB--enable-solarisprivs\fP).
361 .NOP \f\*[B-Font]\-U\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-updateinterval\f[]=\f\*[I-Font]number\f[]
365 Give the time in seconds between two scans for new or dropped interfaces.
368 Use 0 to disable scanning. 60 seconds is the minimum time between scans.
370 .NOP \f\*[B-Font]\-\-var\f[]=\f\*[I-Font]nvar\f[]
375 .NOP \f\*[B-Font]\-\-dvar\f[]=\f\*[I-Font]ndvar\f[]
380 .NOP \f\*[B-Font]\-w\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-wait\-sync\f[]=\f\*[I-Font]number\f[]
395 .NOP \f\*[B-Font]\-x\f[], \f\*[B-Font]\-\-slew\f[]
398 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.
400 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.
403 \fB-g\fP
405 \fB-q\fP
410 Note: The kernel time discipline is disabled with this option.
412 .NOP \f\*[B-Font]\-\-usepcc\f[]
420 .NOP \f\*[B-Font]\-\-pccfreq\f[]=\f\*[I-Font]string\f[]
427 .NOP \f\*[B-Font]\-m\f[], \f\*[B-Font]\-\-mdns\f[]
433 .NOP \f\*[B-Font]\-\&?\f[], \f\*[B-Font]\-\-help\f[]
436 .NOP \f\*[B-Font]\-\&!\f[], \f\*[B-Font]\-\-more-help\f[]
439 .NOP \f\*[B-Font]\-\-version\f[] [{\f\*[I-Font]v|c|n\f[]}]
448   \fBNTPD_<option-name>\fP or \fBNTPD\fP
454 \f\*[B-Font]ntpd\fP
470 \f\*[B-Font]iburst\f[]
472 \f\*[B-Font]server\f[]
480 time-of-year (TOY) chip to maintain the time during periods when
483 initialize the operating system time.
486 chip from time to time.
488 \f\*[B-Font]ntpd\fP
489 detects that the time on the host
490 is more than 1000s from the server time,
491 \f\*[B-Font]ntpd\fP
498 \f\*[B-Font]ntpd\fP
502 \f\*[B-Font]\-g\f[]
504 clock will be set to the server time regardless of the chip time
510 \f\*[B-Font]ntpd\fP
516 \f\*[B-Font]ntpd\fP
522 the synchronization distance, which is equal to one-half the
525 \f\*[B-Font]ntpd\fP
526 algorithms discard sample offsets exceeding 128 ms,
528 ms exceeds 900s.
530 offset, steps the clock to the indicated time.
538 very rarely strays more than 128 ms even under extreme cases of
541 \f\*[B-Font]ntpd\fP
544 the error might grow to exceed 128 ms,
546 if the local clock time is more than 128 s
551 \f\*[B-Font]\-x\f[]
557 \f\*[B-Font]\-x\f[]
560 to 500 parts-per-million (PPM) as a consequence of the correctness
563 As a result, the local clock can take a long time to
569 correctly synchronized network time.
574 frequency errors are present the resulting time offsets stray
575 outside the 128-ms range and an eventual step or slew time
580 \f\*[B-Font]ntpd\fP
589 \f\*[B-Font]time.ien.it\f[]
594 \f\*[B-Font]burst\f[]
603 in the past many startup scripts would run
612 and you still need to set the system time before starting
613 \f\*[B-Font]ntpd\fP,
618 \f\*[B-Font]ntpd\fP.
627 \f\*[B-Font]iburst\f[]
629 \f\*[B-Font]server\f[]
638 will effectively "warm-start" and your system's clock will
639 be stable in under 11 seconds' time.
643 As soon as possible in the startup sequence, start
646 \f\*[B-Font]\-g\f[]
648 \f\*[B-Font]\-N\f[]
654 as much time as possible to get the system's clock synchronized and stable.
660 \f\*[B-Font]dovecot\f[]
663 monotonically-increasing time,
665 \fCntp-wait\f[]\fR(@NTP_WAIT_MS@)\f[]
668 \f\*[B-Font]\-v\f[]
671 \fCntp-wait\f[]\fR(@NTP_WAIT_MS@)\f[]
674 stable time.
677 \f\*[B-Font]ntpd\fP
678 behavior at startup depends on whether the
685 \f\*[B-Font]ntpd\fP
687 \f\*[B-Font]ntpd\fP
689 the particular system clock oscillator time and frequency error.
690 This takes approximately 15 minutes, after which the time and
692 \f\*[B-Font]ntpd\fP
694 normal mode, where the time and frequency are continuously tracked
699 \f\*[B-Font]ntpd\fP
701 \f\*[B-Font]ntpd\fP
708 \f\*[B-Font]ntpd\fP
720 However, it can operate in a one-time
721 mode where the time is set from an external server and frequency is
725 compute server-client propagation delay correction factors and
734 \f\*[B-Font]ntpd\fP
747 unreachable for some time, the poll interval is increased in steps
753 \f\*[B-Font]ntpd\fP
765 \f\*[B-Font]ntpd\fP.
767 \f\*[B-Font]\-q\f[]
770 \f\*[B-Font]ntpd\fP
772 setting the clock for the first time.
776 \f\*[B-Font]iburst\f[]
778 \f\*[B-Font]server\f[]
799 \f\*[B-Font]ntpd\fP
806 \f\*[B-Font]ntpd\fP
808 stopped and run in one-time mode as required.
809 At each startup, the
824 \f\*[B-Font]tinker\f[]
825 \f\*[B-Font]minpoll\f[]
829 \f\*[B-Font]minpoll\f[]
861 .SS "The huff-n'-puff Filter"
868 many cases the apparent time errors are so large as to exceed the
874 The huff-n'-puff filter is designed to correct the apparent time
894 \f\*[B-Font]tinker\f[]
896 \f\*[B-Font]huffpuff\f[]
927 it to autogen-users@lists.sourceforge.net.  Thank you.
945 \fINetwork Time Protocol (Version 1)\fR,
950 \fINetwork Time Protocol (Version 2)\fR,
955 \fINetwork Time Protocol (Version 3)\fR,
960 \fINetwork Time Protocol Version 4: Protocol and Algorithms Specification\fR,
965 \fINetwork Time Protocol Version 4: Autokey Specification\fR,
970 \fIDefinitions of Managed Objects for Network Time Protocol Version 4: (NTPv4)\fR,
975 \fINetwork Time Protocol (NTP) Server Option for DHCPv6\fR,
980 The University of Delaware and Network Time Foundation
982 Copyright (C) 1992-2024 The University of Delaware and Network Time Foundation all rights reserved.
986 \f\*[B-Font]ntpd\fP
989 larger than might be desirable for an elevated-priority
990 \f\*[B-Font]ntpd\fP
1004 This manual page was \fIAutoGen\fP-erated from the \fBntpd\fP