12b15cb3dSCy Schubert<html lang="en"> 22b15cb3dSCy Schubert<head> 32b15cb3dSCy Schubert<title>ntpd: Network Time Protocol (NTP) Daemon User's Manual</title> 42b15cb3dSCy Schubert<meta http-equiv="Content-Type" content="text/html"> 52b15cb3dSCy Schubert<meta name="description" content="ntpd: Network Time Protocol (NTP) Daemon User's Manual"> 62b15cb3dSCy Schubert<meta name="generator" content="makeinfo 4.7"> 72b15cb3dSCy Schubert<link title="Top" rel="top" href="#Top"> 82b15cb3dSCy Schubert<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 92b15cb3dSCy Schubert<meta http-equiv="Content-Style-Type" content="text/css"> 102b15cb3dSCy Schubert<style type="text/css"><!-- 112b15cb3dSCy Schubert pre.display { font-family:inherit } 122b15cb3dSCy Schubert pre.format { font-family:inherit } 132b15cb3dSCy Schubert pre.smalldisplay { font-family:inherit; font-size:smaller } 142b15cb3dSCy Schubert pre.smallformat { font-family:inherit; font-size:smaller } 152b15cb3dSCy Schubert pre.smallexample { font-size:smaller } 162b15cb3dSCy Schubert pre.smalllisp { font-size:smaller } 172b15cb3dSCy Schubert span.sc { font-variant:small-caps } 182b15cb3dSCy Schubert span.roman { font-family: serif; font-weight: normal; } 192b15cb3dSCy Schubert--></style> 202b15cb3dSCy Schubert</head> 212b15cb3dSCy Schubert<body> 222b15cb3dSCy Schubert<h1 class="settitle">ntpd: Network Time Protocol (NTP) Daemon User's Manual</h1> 232b15cb3dSCy Schubert<div class="node"> 242b15cb3dSCy Schubert<p><hr> 252b15cb3dSCy Schubert<a name="Top"></a>Next: <a rel="next" accesskey="n" href="#ntpd-Description">ntpd Description</a>, 262b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#dir">(dir)</a>, 272b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#dir">(dir)</a> 282b15cb3dSCy Schubert<br> 292b15cb3dSCy Schubert</div> 302b15cb3dSCy Schubert 312b15cb3dSCy Schubert<h2 class="unnumbered">ntpd: Network Time Protocol (NTP) Daemon User Manual</h2> 322b15cb3dSCy Schubert 332b15cb3dSCy Schubert<p>The <code>ntpd</code> program is an operating system daemon that synchronizes the 342b15cb3dSCy Schubertsystem clock to remote NTP time servers or local reference clocks. 352b15cb3dSCy SchubertIt is a complete implementation of NTP version 4 defined by RFC-5905, but 362b15cb3dSCy Schubertalso retains compatible with version 3 defined by RFC-1305 and versions 372b15cb3dSCy Schubert1 and 2, defined by RFC-1059 and RFC-1119, respectively. 382b15cb3dSCy SchubertThe program can operate in any of several modes, including client/server, 392b15cb3dSCy Schubertsymmetric and broadcast modes, and with both symmetric-key and public-key 402b15cb3dSCy Schubertcryptography. 412b15cb3dSCy Schubert 42*a25439b6SCy Schubert <p>This document applies to version 4.2.8p2 of <code>ntpd</code>. 432b15cb3dSCy Schubert 442b15cb3dSCy Schubert<ul class="menu"> 452b15cb3dSCy Schubert<li><a accesskey="1" href="#ntpd-Description">ntpd Description</a>: Description 462b15cb3dSCy Schubert<li><a accesskey="2" href="#ntpd-Invocation">ntpd Invocation</a>: Invoking ntpd 472b15cb3dSCy Schubert<li><a accesskey="3" href="#Usage">Usage</a>: Usage 482b15cb3dSCy Schubert</ul> 492b15cb3dSCy Schubert 502b15cb3dSCy Schubert<div class="node"> 512b15cb3dSCy Schubert<p><hr> 522b15cb3dSCy Schubert<a name="ntpd-Description"></a> 532b15cb3dSCy Schubert<br> 542b15cb3dSCy Schubert</div> 552b15cb3dSCy Schubert 562b15cb3dSCy Schubert<!-- node-name, next, previous, up --> 572b15cb3dSCy Schubert<h3 class="section">Description</h3> 582b15cb3dSCy Schubert 592b15cb3dSCy Schubert<p>The <code>ntpd</code> program ordinarily requires 602b15cb3dSCy Schuberta configuration file described at <a href="#ntp_002econf">ntp.conf</a>. 612b15cb3dSCy SchubertThis configuration file contains configuration commands described on 622b15cb3dSCy Schubertthe pages listed above. 632b15cb3dSCy SchubertHowever a client can discover remote servers and configure them 642b15cb3dSCy Schubertautomatically. 652b15cb3dSCy SchubertThis makes it possible to deploy a fleet of workstations without 662b15cb3dSCy Schubertspecifying configuration details specific to the local environment. 672b15cb3dSCy Schubert 682b15cb3dSCy Schubert <p>The <code>ntpd</code> program normally operates continuously while adjusting the 692b15cb3dSCy Schubertsystem time and frequency, but in some cases this might not be 702b15cb3dSCy Schubertpractical. 712b15cb3dSCy SchubertWith the <code>-q</code> option <code>ntpd</code> operates as in continuous mode, but 722b15cb3dSCy Schubertexits just after setting the clock for the first time. 732b15cb3dSCy SchubertMost applications will probably want to specify the <code>iburst</code> 742b15cb3dSCy Schubertoption with the <code>server</code> command. 752b15cb3dSCy SchubertWith this option an initial volley of messages is exchanged to 762b15cb3dSCy Schubertgroom the data and set the clock in about ten seconds' time. 772b15cb3dSCy SchubertIf nothing is heard after a few minutes' time, 782b15cb3dSCy Schubertthe daemon times out and exits without setting the clock. 792b15cb3dSCy Schubert 802b15cb3dSCy Schubert<div class="node"> 812b15cb3dSCy Schubert<p><hr> 822b15cb3dSCy Schubert<a name="ntpd-Invocation"></a> 832b15cb3dSCy Schubert<br> 842b15cb3dSCy Schubert</div> 852b15cb3dSCy Schubert 862b15cb3dSCy Schubert<h3 class="section">Invoking ntpd</h3> 872b15cb3dSCy Schubert 882b15cb3dSCy Schubert<p><a name="index-ntpd-1"></a><a name="index-NTP-daemon-program-2"></a> 892b15cb3dSCy Schubert 902b15cb3dSCy Schubert <p>The 912b15cb3dSCy Schubert<code>ntpd</code> 922b15cb3dSCy Schubertutility is an operating system daemon which sets 932b15cb3dSCy Schubertand maintains the system time of day in synchronism with Internet 942b15cb3dSCy Schubertstandard time servers. 952b15cb3dSCy SchubertIt is a complete implementation of the 962b15cb3dSCy SchubertNetwork Time Protocol (NTP) version 4, as defined by RFC-5905, 972b15cb3dSCy Schubertbut also retains compatibility with 982b15cb3dSCy Schubertversion 3, as defined by RFC-1305, and versions 1 992b15cb3dSCy Schubertand 2, as defined by RFC-1059 and RFC-1119, respectively. 1002b15cb3dSCy Schubert 1012b15cb3dSCy Schubert <p>The 1022b15cb3dSCy Schubert<code>ntpd</code> 1032b15cb3dSCy Schubertutility does most computations in 64-bit floating point 1042b15cb3dSCy Schubertarithmetic and does relatively clumsy 64-bit fixed point operations 1052b15cb3dSCy Schubertonly when necessary to preserve the ultimate precision, about 232 1062b15cb3dSCy Schubertpicoseconds. 1072b15cb3dSCy SchubertWhile the ultimate precision is not achievable with 1082b15cb3dSCy Schubertordinary workstations and networks of today, it may be required 1092b15cb3dSCy Schubertwith future gigahertz CPU clocks and gigabit LANs. 1102b15cb3dSCy Schubert 1112b15cb3dSCy Schubert <p>Ordinarily, 1122b15cb3dSCy Schubert<code>ntpd</code> 1132b15cb3dSCy Schubertreads the 1142b15cb3dSCy Schubert<code>ntp.conf(5)</code> 1152b15cb3dSCy Schubertconfiguration file at startup time in order to determine the 1162b15cb3dSCy Schubertsynchronization sources and operating modes. 1172b15cb3dSCy SchubertIt is also possible to 1182b15cb3dSCy Schubertspecify a working, although limited, configuration entirely on the 1192b15cb3dSCy Schubertcommand line, obviating the need for a configuration file. 1202b15cb3dSCy SchubertThis may 1212b15cb3dSCy Schubertbe particularly useful when the local host is to be configured as a 1222b15cb3dSCy Schubertbroadcast/multicast client, with all peers being determined by 1232b15cb3dSCy Schubertlistening to broadcasts at run time. 1242b15cb3dSCy Schubert 1252b15cb3dSCy Schubert <p>If NetInfo support is built into 1262b15cb3dSCy Schubert<code>ntpd</code> 1272b15cb3dSCy Schubertthen 1282b15cb3dSCy Schubert<code>ntpd</code> 1292b15cb3dSCy Schubertwill attempt to read its configuration from the 1302b15cb3dSCy SchubertNetInfo if the default 1312b15cb3dSCy Schubert<code>ntp.conf(5)</code> 1322b15cb3dSCy Schubertfile cannot be read and no file is 1332b15cb3dSCy Schubertspecified by the 1342b15cb3dSCy Schubert<code>-c</code> 1352b15cb3dSCy Schubertoption. 1362b15cb3dSCy Schubert 1372b15cb3dSCy Schubert <p>Various internal 1382b15cb3dSCy Schubert<code>ntpd</code> 1392b15cb3dSCy Schubertvariables can be displayed and 1402b15cb3dSCy Schubertconfiguration options altered while the 1412b15cb3dSCy Schubert<code>ntpd</code> 1422b15cb3dSCy Schubertis running 1432b15cb3dSCy Schubertusing the 1442b15cb3dSCy Schubert<code>ntpq(1ntpqmdoc)</code> 1452b15cb3dSCy Schubertand 1462b15cb3dSCy Schubert<code>ntpdc(1ntpdcmdoc)</code> 1472b15cb3dSCy Schubertutility programs. 1482b15cb3dSCy Schubert 1492b15cb3dSCy Schubert <p>When 1502b15cb3dSCy Schubert<code>ntpd</code> 1512b15cb3dSCy Schubertstarts it looks at the value of 1522b15cb3dSCy Schubert<code>umask(2)</code>, 1532b15cb3dSCy Schubertand if zero 1542b15cb3dSCy Schubert<code>ntpd</code> 1552b15cb3dSCy Schubertwill set the 1562b15cb3dSCy Schubert<code>umask(2)</code> 1572b15cb3dSCy Schubertto 022. 1582b15cb3dSCy Schubert 1592b15cb3dSCy Schubert <p>This section was generated by <strong>AutoGen</strong>, 1602b15cb3dSCy Schubertusing the <code>agtexi-cmd</code> template and the option descriptions for the <code>ntpd</code> program. 1612b15cb3dSCy SchubertThis software is released under the NTP license, <http://ntp.org/license>. 1622b15cb3dSCy Schubert 1632b15cb3dSCy Schubert<ul class="menu"> 1642b15cb3dSCy Schubert<li><a accesskey="1" href="#ntpd-usage">ntpd usage</a>: ntpd help/usage (<span class="option">--help</span>) 1652b15cb3dSCy Schubert<li><a accesskey="2" href="#ntpd-ipv4">ntpd ipv4</a>: ipv4 option (-4) 1662b15cb3dSCy Schubert<li><a accesskey="3" href="#ntpd-ipv6">ntpd ipv6</a>: ipv6 option (-6) 1672b15cb3dSCy Schubert<li><a accesskey="4" href="#ntpd-authreq">ntpd authreq</a>: authreq option (-a) 1682b15cb3dSCy Schubert<li><a accesskey="5" href="#ntpd-authnoreq">ntpd authnoreq</a>: authnoreq option (-A) 1692b15cb3dSCy Schubert<li><a accesskey="6" href="#ntpd-configfile">ntpd configfile</a>: configfile option (-c) 1702b15cb3dSCy Schubert<li><a accesskey="7" href="#ntpd-driftfile">ntpd driftfile</a>: driftfile option (-f) 1712b15cb3dSCy Schubert<li><a accesskey="8" href="#ntpd-panicgate">ntpd panicgate</a>: panicgate option (-g) 172*a25439b6SCy Schubert<li><a accesskey="9" href="#ntpd-force_002dstep_002donce">ntpd force-step-once</a>: force-step-once option (-G) 173*a25439b6SCy Schubert<li><a href="#ntpd-jaildir">ntpd jaildir</a>: jaildir option (-i) 1742b15cb3dSCy Schubert<li><a href="#ntpd-interface">ntpd interface</a>: interface option (-I) 1752b15cb3dSCy Schubert<li><a href="#ntpd-keyfile">ntpd keyfile</a>: keyfile option (-k) 1762b15cb3dSCy Schubert<li><a href="#ntpd-logfile">ntpd logfile</a>: logfile option (-l) 1772b15cb3dSCy Schubert<li><a href="#ntpd-novirtualips">ntpd novirtualips</a>: novirtualips option (-L) 1782b15cb3dSCy Schubert<li><a href="#ntpd-modifymmtimer">ntpd modifymmtimer</a>: modifymmtimer option (-M) 1792b15cb3dSCy Schubert<li><a href="#ntpd-nice">ntpd nice</a>: nice option (-N) 1802b15cb3dSCy Schubert<li><a href="#ntpd-pidfile">ntpd pidfile</a>: pidfile option (-p) 1812b15cb3dSCy Schubert<li><a href="#ntpd-priority">ntpd priority</a>: priority option (-P) 1822b15cb3dSCy Schubert<li><a href="#ntpd-quit">ntpd quit</a>: quit option (-q) 1832b15cb3dSCy Schubert<li><a href="#ntpd-propagationdelay">ntpd propagationdelay</a>: propagationdelay option (-r) 1842b15cb3dSCy Schubert<li><a href="#ntpd-saveconfigquit">ntpd saveconfigquit</a>: saveconfigquit option 1852b15cb3dSCy Schubert<li><a href="#ntpd-statsdir">ntpd statsdir</a>: statsdir option (-s) 1862b15cb3dSCy Schubert<li><a href="#ntpd-trustedkey">ntpd trustedkey</a>: trustedkey option (-t) 1872b15cb3dSCy Schubert<li><a href="#ntpd-user">ntpd user</a>: user option (-u) 1882b15cb3dSCy Schubert<li><a href="#ntpd-updateinterval">ntpd updateinterval</a>: updateinterval option (-U) 1892b15cb3dSCy Schubert<li><a href="#ntpd-wait_002dsync">ntpd wait-sync</a>: wait-sync option (-w) 1902b15cb3dSCy Schubert<li><a href="#ntpd-slew">ntpd slew</a>: slew option (-x) 1912b15cb3dSCy Schubert<li><a href="#ntpd-usepcc">ntpd usepcc</a>: usepcc option 1922b15cb3dSCy Schubert<li><a href="#ntpd-pccfreq">ntpd pccfreq</a>: pccfreq option 1932b15cb3dSCy Schubert<li><a href="#ntpd-mdns">ntpd mdns</a>: mdns option (-m) 1942b15cb3dSCy Schubert<li><a href="#ntpd-config">ntpd config</a>: presetting/configuring ntpd 1952b15cb3dSCy Schubert<li><a href="#ntpd-exit-status">ntpd exit status</a>: exit status 1962b15cb3dSCy Schubert<li><a href="#ntpd-Usage">ntpd Usage</a>: Usage 1972b15cb3dSCy Schubert<li><a href="#ntpd-Files">ntpd Files</a>: Files 1982b15cb3dSCy Schubert<li><a href="#ntpd-See-Also">ntpd See Also</a>: See Also 1992b15cb3dSCy Schubert<li><a href="#ntpd-Bugs">ntpd Bugs</a>: Bugs 2002b15cb3dSCy Schubert<li><a href="#ntpd-Notes">ntpd Notes</a>: Notes 2012b15cb3dSCy Schubert</ul> 2022b15cb3dSCy Schubert 2032b15cb3dSCy Schubert<div class="node"> 2042b15cb3dSCy Schubert<p><hr> 2052b15cb3dSCy Schubert<a name="ntpd-usage"></a>Next: <a rel="next" accesskey="n" href="#ntpd-ipv4">ntpd ipv4</a>, 2062b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 2072b15cb3dSCy Schubert<br> 2082b15cb3dSCy Schubert</div> 2092b15cb3dSCy Schubert 2102b15cb3dSCy Schubert<h4 class="subsection">ntpd help/usage (<span class="option">--help</span>)</h4> 2112b15cb3dSCy Schubert 2122b15cb3dSCy Schubert<p><a name="index-ntpd-help-3"></a> 2132b15cb3dSCy SchubertThis is the automatically generated usage text for ntpd. 2142b15cb3dSCy Schubert 2152b15cb3dSCy Schubert <p>The text printed is the same whether selected with the <code>help</code> option 2162b15cb3dSCy Schubert(<span class="option">--help</span>) or the <code>more-help</code> option (<span class="option">--more-help</span>). <code>more-help</code> will print 2172b15cb3dSCy Schubertthe usage text by passing it through a pager program. 2182b15cb3dSCy Schubert<code>more-help</code> is disabled on platforms without a working 2192b15cb3dSCy Schubert<code>fork(2)</code> function. The <code>PAGER</code> environment variable is 2202b15cb3dSCy Schubertused to select the program, defaulting to <span class="file">more</span>. Both will exit 2212b15cb3dSCy Schubertwith a status code of 0. 2222b15cb3dSCy Schubert 223*a25439b6SCy Schubert<pre class="example">ntpd - NTP daemon program - Ver. 4.2.8p2-RC3 2242b15cb3dSCy SchubertUsage: ntpd [ -<flag> [<val>] | --<name>[{=| }<val>] ]... \ 2252b15cb3dSCy Schubert [ <server1> ... <serverN> ] 2262b15cb3dSCy Schubert Flg Arg Option-Name Description 2272b15cb3dSCy Schubert -4 no ipv4 Force IPv4 DNS name resolution 2282b15cb3dSCy Schubert - prohibits the option 'ipv6' 2292b15cb3dSCy Schubert -6 no ipv6 Force IPv6 DNS name resolution 2302b15cb3dSCy Schubert - prohibits the option 'ipv4' 2312b15cb3dSCy Schubert -a no authreq Require crypto authentication 2322b15cb3dSCy Schubert - prohibits the option 'authnoreq' 2332b15cb3dSCy Schubert -A no authnoreq Do not require crypto authentication 2342b15cb3dSCy Schubert - prohibits the option 'authreq' 2352b15cb3dSCy Schubert -b no bcastsync Allow us to sync to broadcast servers 2362b15cb3dSCy Schubert -c Str configfile configuration file name 2372b15cb3dSCy Schubert -d no debug-level Increase debug verbosity level 2382b15cb3dSCy Schubert - may appear multiple times 2392b15cb3dSCy Schubert -D Num set-debug-level Set the debug verbosity level 2402b15cb3dSCy Schubert - may appear multiple times 2412b15cb3dSCy Schubert -f Str driftfile frequency drift file name 2422b15cb3dSCy Schubert -g no panicgate Allow the first adjustment to be Big 2432b15cb3dSCy Schubert - may appear multiple times 244*a25439b6SCy Schubert -G no force-step-once Step any initial offset correction. 2452b15cb3dSCy Schubert -i Str jaildir Jail directory 2462b15cb3dSCy Schubert -I Str interface Listen on an interface name or address 2472b15cb3dSCy Schubert - may appear multiple times 2482b15cb3dSCy Schubert -k Str keyfile path to symmetric keys 2492b15cb3dSCy Schubert -l Str logfile path to the log file 2502b15cb3dSCy Schubert -L no novirtualips Do not listen to virtual interfaces 2512b15cb3dSCy Schubert -n no nofork Do not fork 2522b15cb3dSCy Schubert - prohibits the option 'wait-sync' 2532b15cb3dSCy Schubert -N no nice Run at high priority 2542b15cb3dSCy Schubert -p Str pidfile path to the PID file 2552b15cb3dSCy Schubert -P Num priority Process priority 2562b15cb3dSCy Schubert -q no quit Set the time and quit 2572b15cb3dSCy Schubert - prohibits these options: 2582b15cb3dSCy Schubert saveconfigquit 2592b15cb3dSCy Schubert wait-sync 2602b15cb3dSCy Schubert -r Str propagationdelay Broadcast/propagation delay 2612b15cb3dSCy Schubert Str saveconfigquit Save parsed configuration and quit 2622b15cb3dSCy Schubert - prohibits these options: 2632b15cb3dSCy Schubert quit 2642b15cb3dSCy Schubert wait-sync 2652b15cb3dSCy Schubert -s Str statsdir Statistics file location 2662b15cb3dSCy Schubert -t Str trustedkey Trusted key number 2672b15cb3dSCy Schubert - may appear multiple times 2682b15cb3dSCy Schubert -u Str user Run as userid (or userid:groupid) 2692b15cb3dSCy Schubert -U Num updateinterval interval in seconds between scans for new or dropped interfaces 2702b15cb3dSCy Schubert Str var make ARG an ntp variable (RW) 2712b15cb3dSCy Schubert - may appear multiple times 2722b15cb3dSCy Schubert Str dvar make ARG an ntp variable (RW|DEF) 2732b15cb3dSCy Schubert - may appear multiple times 2742b15cb3dSCy Schubert -w Num wait-sync Seconds to wait for first clock sync 2752b15cb3dSCy Schubert - prohibits these options: 2762b15cb3dSCy Schubert nofork 2772b15cb3dSCy Schubert quit 2782b15cb3dSCy Schubert saveconfigquit 2792b15cb3dSCy Schubert -x no slew Slew up to 600 seconds 2802b15cb3dSCy Schubert opt version output version information and exit 2812b15cb3dSCy Schubert -? no help display extended usage information and exit 2822b15cb3dSCy Schubert -! no more-help extended usage information passed thru pager 2832b15cb3dSCy Schubert 2842b15cb3dSCy SchubertOptions are specified by doubled hyphens and their name or by a single 2852b15cb3dSCy Schuberthyphen and the flag character. 2862b15cb3dSCy Schubert 2872b15cb3dSCy Schubert 2882b15cb3dSCy SchubertThe following option preset mechanisms are supported: 2892b15cb3dSCy Schubert - examining environment variables named NTPD_* 2902b15cb3dSCy Schubert 2912b15cb3dSCy SchubertPlease send bug reports to: <http://bugs.ntp.org, bugs@ntp.org> 2922b15cb3dSCy Schubert</pre> 2932b15cb3dSCy Schubert <div class="node"> 2942b15cb3dSCy Schubert<p><hr> 2952b15cb3dSCy Schubert<a name="ntpd-ipv4"></a>Next: <a rel="next" accesskey="n" href="#ntpd-ipv6">ntpd ipv6</a>, 2962b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-usage">ntpd usage</a>, 2972b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 2982b15cb3dSCy Schubert<br> 2992b15cb3dSCy Schubert</div> 3002b15cb3dSCy Schubert 3012b15cb3dSCy Schubert<h4 class="subsection">ipv4 option (-4)</h4> 3022b15cb3dSCy Schubert 3032b15cb3dSCy Schubert<p><a name="index-ntpd_002dipv4-4"></a> 3042b15cb3dSCy SchubertThis is the “force ipv4 dns name resolution” option. 3052b15cb3dSCy Schubert 3062b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 3072b15cb3dSCy Schubert <ul> 3082b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 3092b15cb3dSCy Schubertipv6. 3102b15cb3dSCy Schubert</ul> 3112b15cb3dSCy Schubert 3122b15cb3dSCy Schubert <p>Force DNS resolution of following host names on the command line 3132b15cb3dSCy Schubertto the IPv4 namespace. 3142b15cb3dSCy Schubert<div class="node"> 3152b15cb3dSCy Schubert<p><hr> 3162b15cb3dSCy Schubert<a name="ntpd-ipv6"></a>Next: <a rel="next" accesskey="n" href="#ntpd-authreq">ntpd authreq</a>, 3172b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-ipv4">ntpd ipv4</a>, 3182b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 3192b15cb3dSCy Schubert<br> 3202b15cb3dSCy Schubert</div> 3212b15cb3dSCy Schubert 3222b15cb3dSCy Schubert<h4 class="subsection">ipv6 option (-6)</h4> 3232b15cb3dSCy Schubert 3242b15cb3dSCy Schubert<p><a name="index-ntpd_002dipv6-5"></a> 3252b15cb3dSCy SchubertThis is the “force ipv6 dns name resolution” option. 3262b15cb3dSCy Schubert 3272b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 3282b15cb3dSCy Schubert <ul> 3292b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 3302b15cb3dSCy Schubertipv4. 3312b15cb3dSCy Schubert</ul> 3322b15cb3dSCy Schubert 3332b15cb3dSCy Schubert <p>Force DNS resolution of following host names on the command line 3342b15cb3dSCy Schubertto the IPv6 namespace. 3352b15cb3dSCy Schubert<div class="node"> 3362b15cb3dSCy Schubert<p><hr> 3372b15cb3dSCy Schubert<a name="ntpd-authreq"></a>Next: <a rel="next" accesskey="n" href="#ntpd-authnoreq">ntpd authnoreq</a>, 3382b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-ipv6">ntpd ipv6</a>, 3392b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 3402b15cb3dSCy Schubert<br> 3412b15cb3dSCy Schubert</div> 3422b15cb3dSCy Schubert 3432b15cb3dSCy Schubert<h4 class="subsection">authreq option (-a)</h4> 3442b15cb3dSCy Schubert 3452b15cb3dSCy Schubert<p><a name="index-ntpd_002dauthreq-6"></a> 3462b15cb3dSCy SchubertThis is the “require crypto authentication” option. 3472b15cb3dSCy Schubert 3482b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 3492b15cb3dSCy Schubert <ul> 3502b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 3512b15cb3dSCy Schubertauthnoreq. 3522b15cb3dSCy Schubert</ul> 3532b15cb3dSCy Schubert 3542b15cb3dSCy Schubert <p>Require cryptographic authentication for broadcast client, 3552b15cb3dSCy Schubertmulticast client and symmetric passive associations. 3562b15cb3dSCy SchubertThis is the default. 3572b15cb3dSCy Schubert<div class="node"> 3582b15cb3dSCy Schubert<p><hr> 3592b15cb3dSCy Schubert<a name="ntpd-authnoreq"></a>Next: <a rel="next" accesskey="n" href="#ntpd-configfile">ntpd configfile</a>, 3602b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-authreq">ntpd authreq</a>, 3612b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 3622b15cb3dSCy Schubert<br> 3632b15cb3dSCy Schubert</div> 3642b15cb3dSCy Schubert 3652b15cb3dSCy Schubert<h4 class="subsection">authnoreq option (-A)</h4> 3662b15cb3dSCy Schubert 3672b15cb3dSCy Schubert<p><a name="index-ntpd_002dauthnoreq-7"></a> 3682b15cb3dSCy SchubertThis is the “do not require crypto authentication” option. 3692b15cb3dSCy Schubert 3702b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 3712b15cb3dSCy Schubert <ul> 3722b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 3732b15cb3dSCy Schubertauthreq. 3742b15cb3dSCy Schubert</ul> 3752b15cb3dSCy Schubert 3762b15cb3dSCy Schubert <p>Do not require cryptographic authentication for broadcast client, 3772b15cb3dSCy Schubertmulticast client and symmetric passive associations. 3782b15cb3dSCy SchubertThis is almost never a good idea. 3792b15cb3dSCy Schubert<div class="node"> 3802b15cb3dSCy Schubert<p><hr> 3812b15cb3dSCy Schubert<a name="ntpd-configfile"></a>Next: <a rel="next" accesskey="n" href="#ntpd-driftfile">ntpd driftfile</a>, 3822b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-authnoreq">ntpd authnoreq</a>, 3832b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 3842b15cb3dSCy Schubert<br> 3852b15cb3dSCy Schubert</div> 3862b15cb3dSCy Schubert 3872b15cb3dSCy Schubert<h4 class="subsection">configfile option (-c)</h4> 3882b15cb3dSCy Schubert 3892b15cb3dSCy Schubert<p><a name="index-ntpd_002dconfigfile-8"></a> 3902b15cb3dSCy SchubertThis is the “configuration file name” option. 3912b15cb3dSCy SchubertThis option takes a string argument. 3922b15cb3dSCy SchubertThe name and path of the configuration file, 3932b15cb3dSCy Schubert<span class="file">/etc/ntp.conf</span> 3942b15cb3dSCy Schubertby default. 3952b15cb3dSCy Schubert<div class="node"> 3962b15cb3dSCy Schubert<p><hr> 3972b15cb3dSCy Schubert<a name="ntpd-driftfile"></a>Next: <a rel="next" accesskey="n" href="#ntpd-panicgate">ntpd panicgate</a>, 3982b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-configfile">ntpd configfile</a>, 3992b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 4002b15cb3dSCy Schubert<br> 4012b15cb3dSCy Schubert</div> 4022b15cb3dSCy Schubert 4032b15cb3dSCy Schubert<h4 class="subsection">driftfile option (-f)</h4> 4042b15cb3dSCy Schubert 4052b15cb3dSCy Schubert<p><a name="index-ntpd_002ddriftfile-9"></a> 4062b15cb3dSCy SchubertThis is the “frequency drift file name” option. 4072b15cb3dSCy SchubertThis option takes a string argument. 4082b15cb3dSCy SchubertThe name and path of the frequency file, 4092b15cb3dSCy Schubert<span class="file">/etc/ntp.drift</span> 4102b15cb3dSCy Schubertby default. 4112b15cb3dSCy SchubertThis is the same operation as the 4122b15cb3dSCy Schubert<code>driftfile</code> <kbd>driftfile</kbd> 4132b15cb3dSCy Schubertconfiguration specification in the 4142b15cb3dSCy Schubert<span class="file">/etc/ntp.conf</span> 4152b15cb3dSCy Schubertfile. 4162b15cb3dSCy Schubert<div class="node"> 4172b15cb3dSCy Schubert<p><hr> 418*a25439b6SCy Schubert<a name="ntpd-panicgate"></a>Next: <a rel="next" accesskey="n" href="#ntpd-force_002dstep_002donce">ntpd force-step-once</a>, 4192b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-driftfile">ntpd driftfile</a>, 4202b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 4212b15cb3dSCy Schubert<br> 4222b15cb3dSCy Schubert</div> 4232b15cb3dSCy Schubert 4242b15cb3dSCy Schubert<h4 class="subsection">panicgate option (-g)</h4> 4252b15cb3dSCy Schubert 4262b15cb3dSCy Schubert<p><a name="index-ntpd_002dpanicgate-10"></a> 4272b15cb3dSCy SchubertThis is the “allow the first adjustment to be big” option. 4282b15cb3dSCy Schubert 4292b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 4302b15cb3dSCy Schubert <ul> 4312b15cb3dSCy Schubert<li>may appear an unlimited number of times. 4322b15cb3dSCy Schubert</ul> 4332b15cb3dSCy Schubert 4342b15cb3dSCy Schubert <p>Normally, 4352b15cb3dSCy Schubert<code>ntpd</code> 4362b15cb3dSCy Schubertexits 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, 4372b15cb3dSCy Schubert<code>ntpd</code> 4382b15cb3dSCy Schubertwill exit with a message to the system log. This option can be used with the 4392b15cb3dSCy Schubert<code>-q</code> 4402b15cb3dSCy Schubertand 4412b15cb3dSCy Schubert<code>-x</code> 4422b15cb3dSCy Schubertoptions. 4432b15cb3dSCy SchubertSee the 4442b15cb3dSCy Schubert<code>tinker</code> 4452b15cb3dSCy Schubertconfiguration file directive for other options. 4462b15cb3dSCy Schubert<div class="node"> 4472b15cb3dSCy Schubert<p><hr> 448*a25439b6SCy Schubert<a name="ntpd-force_002dstep_002donce"></a>Next: <a rel="next" accesskey="n" href="#ntpd-jaildir">ntpd jaildir</a>, 4492b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-panicgate">ntpd panicgate</a>, 4502b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 4512b15cb3dSCy Schubert<br> 4522b15cb3dSCy Schubert</div> 4532b15cb3dSCy Schubert 454*a25439b6SCy Schubert<h4 class="subsection">force-step-once option (-G)</h4> 455*a25439b6SCy Schubert 456*a25439b6SCy Schubert<p><a name="index-ntpd_002dforce_002dstep_002donce-11"></a> 457*a25439b6SCy SchubertThis is the “step any initial offset correction.” option. 458*a25439b6SCy SchubertNormally, 459*a25439b6SCy Schubert<code>ntpd</code> 460*a25439b6SCy Schubertsteps the time if the time offset exceeds the step threshold, 461*a25439b6SCy Schubertwhich is 128 ms by default, and otherwise slews the time. 462*a25439b6SCy SchubertThis option forces the initial offset correction to be stepped, 463*a25439b6SCy Schubertso the highest time accuracy can be achieved quickly. 464*a25439b6SCy SchubertHowever, this may also cause the time to be stepped back 465*a25439b6SCy Schubertso this option must not be used if 466*a25439b6SCy Schubertapplications requiring monotonic time are running. 467*a25439b6SCy SchubertSee the <code>tinker</code> configuration file directive for other options. 468*a25439b6SCy Schubert<div class="node"> 469*a25439b6SCy Schubert<p><hr> 470*a25439b6SCy Schubert<a name="ntpd-jaildir"></a>Next: <a rel="next" accesskey="n" href="#ntpd-interface">ntpd interface</a>, 471*a25439b6SCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-force_002dstep_002donce">ntpd force-step-once</a>, 472*a25439b6SCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 473*a25439b6SCy Schubert<br> 474*a25439b6SCy Schubert</div> 475*a25439b6SCy Schubert 4762b15cb3dSCy Schubert<h4 class="subsection">jaildir option (-i)</h4> 4772b15cb3dSCy Schubert 478*a25439b6SCy Schubert<p><a name="index-ntpd_002djaildir-12"></a> 4792b15cb3dSCy SchubertThis is the “jail directory” option. 4802b15cb3dSCy SchubertThis option takes a string argument. 4812b15cb3dSCy Schubert 4822b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 4832b15cb3dSCy Schubert <ul> 4842b15cb3dSCy Schubert<li>must be compiled in by defining <code>HAVE_DROPROOT</code> during the compilation. 4852b15cb3dSCy Schubert</ul> 4862b15cb3dSCy Schubert 4872b15cb3dSCy Schubert <p>Chroot the server to the directory 4882b15cb3dSCy Schubert<kbd>jaildir</kbd> 4892b15cb3dSCy Schubert. 4902b15cb3dSCy SchubertThis option also implies that the server attempts to drop root privileges at startup. 4912b15cb3dSCy SchubertYou may need to also specify a 4922b15cb3dSCy Schubert<code>-u</code> 4932b15cb3dSCy Schubertoption. 4942b15cb3dSCy SchubertThis option is only available if the OS supports adjusting the clock 4952b15cb3dSCy Schubertwithout full root privileges. 4962b15cb3dSCy SchubertThis option is supported under NetBSD (configure with 4972b15cb3dSCy Schubert<code>--enable-clockctl</code>) or Linux (configure with 4982b15cb3dSCy Schubert<code>--enable-linuxcaps</code>) or Solaris (configure with <code>--enable-solarisprivs</code>). 4992b15cb3dSCy Schubert<div class="node"> 5002b15cb3dSCy Schubert<p><hr> 5012b15cb3dSCy Schubert<a name="ntpd-interface"></a>Next: <a rel="next" accesskey="n" href="#ntpd-keyfile">ntpd keyfile</a>, 5022b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-jaildir">ntpd jaildir</a>, 5032b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 5042b15cb3dSCy Schubert<br> 5052b15cb3dSCy Schubert</div> 5062b15cb3dSCy Schubert 5072b15cb3dSCy Schubert<h4 class="subsection">interface option (-I)</h4> 5082b15cb3dSCy Schubert 509*a25439b6SCy Schubert<p><a name="index-ntpd_002dinterface-13"></a> 5102b15cb3dSCy SchubertThis is the “listen on an interface name or address” option. 5112b15cb3dSCy SchubertThis option takes a string argument <span class="file">iface</span>. 5122b15cb3dSCy Schubert 5132b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 5142b15cb3dSCy Schubert <ul> 5152b15cb3dSCy Schubert<li>may appear an unlimited number of times. 5162b15cb3dSCy Schubert</ul> 5172b15cb3dSCy Schubert 5182b15cb3dSCy Schubert <p>Open the network address given, or all the addresses associated with the 5192b15cb3dSCy Schubertgiven interface name. This option may appear multiple times. This option 5202b15cb3dSCy Schubertalso implies not opening other addresses, except wildcard and localhost. 5212b15cb3dSCy SchubertThis option is deprecated. Please consider using the configuration file 5222b15cb3dSCy Schubert<code>interface</code> command, which is more versatile. 5232b15cb3dSCy Schubert<div class="node"> 5242b15cb3dSCy Schubert<p><hr> 5252b15cb3dSCy Schubert<a name="ntpd-keyfile"></a>Next: <a rel="next" accesskey="n" href="#ntpd-logfile">ntpd logfile</a>, 5262b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-interface">ntpd interface</a>, 5272b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 5282b15cb3dSCy Schubert<br> 5292b15cb3dSCy Schubert</div> 5302b15cb3dSCy Schubert 5312b15cb3dSCy Schubert<h4 class="subsection">keyfile option (-k)</h4> 5322b15cb3dSCy Schubert 533*a25439b6SCy Schubert<p><a name="index-ntpd_002dkeyfile-14"></a> 5342b15cb3dSCy SchubertThis is the “path to symmetric keys” option. 5352b15cb3dSCy SchubertThis option takes a string argument. 5362b15cb3dSCy SchubertSpecify the name and path of the symmetric key file. 5372b15cb3dSCy Schubert<span class="file">/etc/ntp.keys</span> 5382b15cb3dSCy Schubertis the default. 5392b15cb3dSCy SchubertThis is the same operation as the 5402b15cb3dSCy Schubert<code>keys</code> <kbd>keyfile</kbd> 5412b15cb3dSCy Schubertconfiguration file directive. 5422b15cb3dSCy Schubert<div class="node"> 5432b15cb3dSCy Schubert<p><hr> 5442b15cb3dSCy Schubert<a name="ntpd-logfile"></a>Next: <a rel="next" accesskey="n" href="#ntpd-novirtualips">ntpd novirtualips</a>, 5452b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-keyfile">ntpd keyfile</a>, 5462b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 5472b15cb3dSCy Schubert<br> 5482b15cb3dSCy Schubert</div> 5492b15cb3dSCy Schubert 5502b15cb3dSCy Schubert<h4 class="subsection">logfile option (-l)</h4> 5512b15cb3dSCy Schubert 552*a25439b6SCy Schubert<p><a name="index-ntpd_002dlogfile-15"></a> 5532b15cb3dSCy SchubertThis is the “path to the log file” option. 5542b15cb3dSCy SchubertThis option takes a string argument. 5552b15cb3dSCy SchubertSpecify the name and path of the log file. 5562b15cb3dSCy SchubertThe default is the system log file. 5572b15cb3dSCy SchubertThis is the same operation as the 5582b15cb3dSCy Schubert<code>logfile</code> <kbd>logfile</kbd> 5592b15cb3dSCy Schubertconfiguration file directive. 5602b15cb3dSCy Schubert<div class="node"> 5612b15cb3dSCy Schubert<p><hr> 5622b15cb3dSCy Schubert<a name="ntpd-novirtualips"></a>Next: <a rel="next" accesskey="n" href="#ntpd-modifymmtimer">ntpd modifymmtimer</a>, 5632b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-logfile">ntpd logfile</a>, 5642b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 5652b15cb3dSCy Schubert<br> 5662b15cb3dSCy Schubert</div> 5672b15cb3dSCy Schubert 5682b15cb3dSCy Schubert<h4 class="subsection">novirtualips option (-L)</h4> 5692b15cb3dSCy Schubert 570*a25439b6SCy Schubert<p><a name="index-ntpd_002dnovirtualips-16"></a> 5712b15cb3dSCy SchubertThis is the “do not listen to virtual interfaces” option. 5722b15cb3dSCy SchubertDo not listen to virtual interfaces, defined as those with 5732b15cb3dSCy Schubertnames containing a colon. This option is deprecated. Please 5742b15cb3dSCy Schubertconsider using the configuration file <code>interface</code> command, which 5752b15cb3dSCy Schubertis more versatile. 5762b15cb3dSCy Schubert<div class="node"> 5772b15cb3dSCy Schubert<p><hr> 5782b15cb3dSCy Schubert<a name="ntpd-modifymmtimer"></a>Next: <a rel="next" accesskey="n" href="#ntpd-nice">ntpd nice</a>, 5792b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-novirtualips">ntpd novirtualips</a>, 5802b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 5812b15cb3dSCy Schubert<br> 5822b15cb3dSCy Schubert</div> 5832b15cb3dSCy Schubert 5842b15cb3dSCy Schubert<h4 class="subsection">modifymmtimer option (-M)</h4> 5852b15cb3dSCy Schubert 586*a25439b6SCy Schubert<p><a name="index-ntpd_002dmodifymmtimer-17"></a> 5872b15cb3dSCy SchubertThis is the “modify multimedia timer (windows only)” option. 5882b15cb3dSCy Schubert 5892b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 5902b15cb3dSCy Schubert <ul> 5912b15cb3dSCy Schubert<li>must be compiled in by defining <code>SYS_WINNT</code> during the compilation. 5922b15cb3dSCy Schubert</ul> 5932b15cb3dSCy Schubert 5942b15cb3dSCy Schubert <p>Set the Windows Multimedia Timer to highest resolution. This 5952b15cb3dSCy Schubertensures the resolution does not change while ntpd is running, 5962b15cb3dSCy Schubertavoiding timekeeping glitches associated with changes. 5972b15cb3dSCy Schubert<div class="node"> 5982b15cb3dSCy Schubert<p><hr> 5992b15cb3dSCy Schubert<a name="ntpd-nice"></a>Next: <a rel="next" accesskey="n" href="#ntpd-pidfile">ntpd pidfile</a>, 6002b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-modifymmtimer">ntpd modifymmtimer</a>, 6012b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6022b15cb3dSCy Schubert<br> 6032b15cb3dSCy Schubert</div> 6042b15cb3dSCy Schubert 6052b15cb3dSCy Schubert<h4 class="subsection">nice option (-N)</h4> 6062b15cb3dSCy Schubert 607*a25439b6SCy Schubert<p><a name="index-ntpd_002dnice-18"></a> 6082b15cb3dSCy SchubertThis is the “run at high priority” option. 6092b15cb3dSCy SchubertTo the extent permitted by the operating system, run 6102b15cb3dSCy Schubert<code>ntpd</code> 6112b15cb3dSCy Schubertat the highest priority. 6122b15cb3dSCy Schubert<div class="node"> 6132b15cb3dSCy Schubert<p><hr> 6142b15cb3dSCy Schubert<a name="ntpd-pidfile"></a>Next: <a rel="next" accesskey="n" href="#ntpd-priority">ntpd priority</a>, 6152b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-nice">ntpd nice</a>, 6162b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6172b15cb3dSCy Schubert<br> 6182b15cb3dSCy Schubert</div> 6192b15cb3dSCy Schubert 6202b15cb3dSCy Schubert<h4 class="subsection">pidfile option (-p)</h4> 6212b15cb3dSCy Schubert 622*a25439b6SCy Schubert<p><a name="index-ntpd_002dpidfile-19"></a> 6232b15cb3dSCy SchubertThis is the “path to the pid file” option. 6242b15cb3dSCy SchubertThis option takes a string argument. 6252b15cb3dSCy SchubertSpecify the name and path of the file used to record 6262b15cb3dSCy Schubert<code>ntpd</code>'s 6272b15cb3dSCy Schubertprocess ID. 6282b15cb3dSCy SchubertThis is the same operation as the 6292b15cb3dSCy Schubert<code>pidfile</code> <kbd>pidfile</kbd> 6302b15cb3dSCy Schubertconfiguration file directive. 6312b15cb3dSCy Schubert<div class="node"> 6322b15cb3dSCy Schubert<p><hr> 6332b15cb3dSCy Schubert<a name="ntpd-priority"></a>Next: <a rel="next" accesskey="n" href="#ntpd-quit">ntpd quit</a>, 6342b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-pidfile">ntpd pidfile</a>, 6352b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6362b15cb3dSCy Schubert<br> 6372b15cb3dSCy Schubert</div> 6382b15cb3dSCy Schubert 6392b15cb3dSCy Schubert<h4 class="subsection">priority option (-P)</h4> 6402b15cb3dSCy Schubert 641*a25439b6SCy Schubert<p><a name="index-ntpd_002dpriority-20"></a> 6422b15cb3dSCy SchubertThis is the “process priority” option. 6432b15cb3dSCy SchubertThis option takes a number argument. 6442b15cb3dSCy SchubertTo the extent permitted by the operating system, run 6452b15cb3dSCy Schubert<code>ntpd</code> 6462b15cb3dSCy Schubertat the specified 6472b15cb3dSCy Schubert<code>sched_setscheduler(SCHED_FIFO)</code> 6482b15cb3dSCy Schubertpriority. 6492b15cb3dSCy Schubert<div class="node"> 6502b15cb3dSCy Schubert<p><hr> 6512b15cb3dSCy Schubert<a name="ntpd-quit"></a>Next: <a rel="next" accesskey="n" href="#ntpd-propagationdelay">ntpd propagationdelay</a>, 6522b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-priority">ntpd priority</a>, 6532b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6542b15cb3dSCy Schubert<br> 6552b15cb3dSCy Schubert</div> 6562b15cb3dSCy Schubert 6572b15cb3dSCy Schubert<h4 class="subsection">quit option (-q)</h4> 6582b15cb3dSCy Schubert 659*a25439b6SCy Schubert<p><a name="index-ntpd_002dquit-21"></a> 6602b15cb3dSCy SchubertThis is the “set the time and quit” option. 6612b15cb3dSCy Schubert 6622b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 6632b15cb3dSCy Schubert <ul> 6642b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 6652b15cb3dSCy Schubertsaveconfigquit, wait-sync. 6662b15cb3dSCy Schubert</ul> 6672b15cb3dSCy Schubert 6682b15cb3dSCy Schubert <p><code>ntpd</code> 6692b15cb3dSCy Schubertwill not daemonize and will exit after the clock is first 6702b15cb3dSCy Schubertsynchronized. This behavior mimics that of the 6712b15cb3dSCy Schubert<code>ntpdate</code> 6722b15cb3dSCy Schubertprogram, which will soon be replaced with a shell script. 6732b15cb3dSCy SchubertThe 6742b15cb3dSCy Schubert<code>-g</code> 6752b15cb3dSCy Schubertand 6762b15cb3dSCy Schubert<code>-x</code> 6772b15cb3dSCy Schubertoptions can be used with this option. 6782b15cb3dSCy SchubertNote: The kernel time discipline is disabled with this option. 6792b15cb3dSCy Schubert<div class="node"> 6802b15cb3dSCy Schubert<p><hr> 6812b15cb3dSCy Schubert<a name="ntpd-propagationdelay"></a>Next: <a rel="next" accesskey="n" href="#ntpd-saveconfigquit">ntpd saveconfigquit</a>, 6822b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-quit">ntpd quit</a>, 6832b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6842b15cb3dSCy Schubert<br> 6852b15cb3dSCy Schubert</div> 6862b15cb3dSCy Schubert 6872b15cb3dSCy Schubert<h4 class="subsection">propagationdelay option (-r)</h4> 6882b15cb3dSCy Schubert 689*a25439b6SCy Schubert<p><a name="index-ntpd_002dpropagationdelay-22"></a> 6902b15cb3dSCy SchubertThis is the “broadcast/propagation delay” option. 6912b15cb3dSCy SchubertThis option takes a string argument. 6922b15cb3dSCy SchubertSpecify 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. 6932b15cb3dSCy Schubert<div class="node"> 6942b15cb3dSCy Schubert<p><hr> 6952b15cb3dSCy Schubert<a name="ntpd-saveconfigquit"></a>Next: <a rel="next" accesskey="n" href="#ntpd-statsdir">ntpd statsdir</a>, 6962b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-propagationdelay">ntpd propagationdelay</a>, 6972b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 6982b15cb3dSCy Schubert<br> 6992b15cb3dSCy Schubert</div> 7002b15cb3dSCy Schubert 7012b15cb3dSCy Schubert<h4 class="subsection">saveconfigquit option</h4> 7022b15cb3dSCy Schubert 703*a25439b6SCy Schubert<p><a name="index-ntpd_002dsaveconfigquit-23"></a> 7042b15cb3dSCy SchubertThis is the “save parsed configuration and quit” option. 7052b15cb3dSCy SchubertThis option takes a string argument. 7062b15cb3dSCy Schubert 7072b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 7082b15cb3dSCy Schubert <ul> 7092b15cb3dSCy Schubert<li>must be compiled in by defining <code>SAVECONFIG</code> during the compilation. 7102b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 7112b15cb3dSCy Schubertquit, wait-sync. 7122b15cb3dSCy Schubert</ul> 7132b15cb3dSCy Schubert 7142b15cb3dSCy Schubert <p>Cause <code>ntpd</code> to parse its startup configuration file and save an 7152b15cb3dSCy Schubertequivalent to the given filename and exit. This option was 7162b15cb3dSCy Schubertdesigned for automated testing. 7172b15cb3dSCy Schubert<div class="node"> 7182b15cb3dSCy Schubert<p><hr> 7192b15cb3dSCy Schubert<a name="ntpd-statsdir"></a>Next: <a rel="next" accesskey="n" href="#ntpd-trustedkey">ntpd trustedkey</a>, 7202b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-saveconfigquit">ntpd saveconfigquit</a>, 7212b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 7222b15cb3dSCy Schubert<br> 7232b15cb3dSCy Schubert</div> 7242b15cb3dSCy Schubert 7252b15cb3dSCy Schubert<h4 class="subsection">statsdir option (-s)</h4> 7262b15cb3dSCy Schubert 727*a25439b6SCy Schubert<p><a name="index-ntpd_002dstatsdir-24"></a> 7282b15cb3dSCy SchubertThis is the “statistics file location” option. 7292b15cb3dSCy SchubertThis option takes a string argument. 7302b15cb3dSCy SchubertSpecify the directory path for files created by the statistics facility. 7312b15cb3dSCy SchubertThis is the same operation as the 7322b15cb3dSCy Schubert<code>statsdir</code> <kbd>statsdir</kbd> 7332b15cb3dSCy Schubertconfiguration file directive. 7342b15cb3dSCy Schubert<div class="node"> 7352b15cb3dSCy Schubert<p><hr> 7362b15cb3dSCy Schubert<a name="ntpd-trustedkey"></a>Next: <a rel="next" accesskey="n" href="#ntpd-user">ntpd user</a>, 7372b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-statsdir">ntpd statsdir</a>, 7382b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 7392b15cb3dSCy Schubert<br> 7402b15cb3dSCy Schubert</div> 7412b15cb3dSCy Schubert 7422b15cb3dSCy Schubert<h4 class="subsection">trustedkey option (-t)</h4> 7432b15cb3dSCy Schubert 744*a25439b6SCy Schubert<p><a name="index-ntpd_002dtrustedkey-25"></a> 7452b15cb3dSCy SchubertThis is the “trusted key number” option. 7462b15cb3dSCy SchubertThis option takes a string argument <span class="file">tkey</span>. 7472b15cb3dSCy Schubert 7482b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 7492b15cb3dSCy Schubert <ul> 7502b15cb3dSCy Schubert<li>may appear an unlimited number of times. 7512b15cb3dSCy Schubert</ul> 7522b15cb3dSCy Schubert 7532b15cb3dSCy Schubert <p>Add the specified key number to the trusted key list. 7542b15cb3dSCy Schubert<div class="node"> 7552b15cb3dSCy Schubert<p><hr> 7562b15cb3dSCy Schubert<a name="ntpd-user"></a>Next: <a rel="next" accesskey="n" href="#ntpd-updateinterval">ntpd updateinterval</a>, 7572b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-trustedkey">ntpd trustedkey</a>, 7582b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 7592b15cb3dSCy Schubert<br> 7602b15cb3dSCy Schubert</div> 7612b15cb3dSCy Schubert 7622b15cb3dSCy Schubert<h4 class="subsection">user option (-u)</h4> 7632b15cb3dSCy Schubert 764*a25439b6SCy Schubert<p><a name="index-ntpd_002duser-26"></a> 7652b15cb3dSCy SchubertThis is the “run as userid (or userid:groupid)” option. 7662b15cb3dSCy SchubertThis option takes a string argument. 7672b15cb3dSCy Schubert 7682b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 7692b15cb3dSCy Schubert <ul> 7702b15cb3dSCy Schubert<li>must be compiled in by defining <code>HAVE_DROPROOT</code> during the compilation. 7712b15cb3dSCy Schubert</ul> 7722b15cb3dSCy Schubert 7732b15cb3dSCy Schubert <p>Specify a user, and optionally a group, to switch to. 7742b15cb3dSCy SchubertThis option is only available if the OS supports adjusting the clock 7752b15cb3dSCy Schubertwithout full root privileges. 7762b15cb3dSCy SchubertThis option is supported under NetBSD (configure with 7772b15cb3dSCy Schubert<code>--enable-clockctl</code>) or Linux (configure with 7782b15cb3dSCy Schubert<code>--enable-linuxcaps</code>) or Solaris (configure with <code>--enable-solarisprivs</code>). 7792b15cb3dSCy Schubert<div class="node"> 7802b15cb3dSCy Schubert<p><hr> 7812b15cb3dSCy Schubert<a name="ntpd-updateinterval"></a>Next: <a rel="next" accesskey="n" href="#ntpd-wait_002dsync">ntpd wait-sync</a>, 7822b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-user">ntpd user</a>, 7832b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 7842b15cb3dSCy Schubert<br> 7852b15cb3dSCy Schubert</div> 7862b15cb3dSCy Schubert 7872b15cb3dSCy Schubert<h4 class="subsection">updateinterval option (-U)</h4> 7882b15cb3dSCy Schubert 789*a25439b6SCy Schubert<p><a name="index-ntpd_002dupdateinterval-27"></a> 7902b15cb3dSCy SchubertThis is the “interval in seconds between scans for new or dropped interfaces” option. 7912b15cb3dSCy SchubertThis option takes a number argument. 7922b15cb3dSCy SchubertGive the time in seconds between two scans for new or dropped interfaces. 7932b15cb3dSCy SchubertFor systems with routing socket support the scans will be performed shortly after the interface change 7942b15cb3dSCy Schuberthas been detected by the system. 7952b15cb3dSCy SchubertUse 0 to disable scanning. 60 seconds is the minimum time between scans. 7962b15cb3dSCy Schubert<div class="node"> 7972b15cb3dSCy Schubert<p><hr> 7982b15cb3dSCy Schubert<a name="ntpd-wait_002dsync"></a>Next: <a rel="next" accesskey="n" href="#ntpd-slew">ntpd slew</a>, 7992b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-updateinterval">ntpd updateinterval</a>, 8002b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 8012b15cb3dSCy Schubert<br> 8022b15cb3dSCy Schubert</div> 8032b15cb3dSCy Schubert 8042b15cb3dSCy Schubert<h4 class="subsection">wait-sync option (-w)</h4> 8052b15cb3dSCy Schubert 806*a25439b6SCy Schubert<p><a name="index-ntpd_002dwait_002dsync-28"></a> 8072b15cb3dSCy SchubertThis is the “seconds to wait for first clock sync” option. 8082b15cb3dSCy SchubertThis option takes a number argument. 8092b15cb3dSCy Schubert 8102b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 8112b15cb3dSCy Schubert <ul> 8122b15cb3dSCy Schubert<li>must be compiled in by defining <code>HAVE_WORKING_FORK</code> during the compilation. 8132b15cb3dSCy Schubert<li>must not appear in combination with any of the following options: 8142b15cb3dSCy Schubertnofork, quit, saveconfigquit. 8152b15cb3dSCy Schubert</ul> 8162b15cb3dSCy Schubert 8172b15cb3dSCy Schubert <p>If greater than zero, alters <code>ntpd</code>'s behavior when forking to 8182b15cb3dSCy Schubertdaemonize. Instead of exiting with status 0 immediately after 8192b15cb3dSCy Schubertthe fork, the parent waits up to the specified number of 8202b15cb3dSCy Schubertseconds for the child to first synchronize the clock. The exit 8212b15cb3dSCy Schubertstatus is zero (success) if the clock was synchronized, 8222b15cb3dSCy Schubertotherwise it is <code>ETIMEDOUT</code>. 8232b15cb3dSCy SchubertThis provides the option for a script starting <code>ntpd</code> to easily 8242b15cb3dSCy Schubertwait for the first set of the clock before proceeding. 8252b15cb3dSCy Schubert<div class="node"> 8262b15cb3dSCy Schubert<p><hr> 8272b15cb3dSCy Schubert<a name="ntpd-slew"></a>Next: <a rel="next" accesskey="n" href="#ntpd-usepcc">ntpd usepcc</a>, 8282b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-wait_002dsync">ntpd wait-sync</a>, 8292b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 8302b15cb3dSCy Schubert<br> 8312b15cb3dSCy Schubert</div> 8322b15cb3dSCy Schubert 8332b15cb3dSCy Schubert<h4 class="subsection">slew option (-x)</h4> 8342b15cb3dSCy Schubert 835*a25439b6SCy Schubert<p><a name="index-ntpd_002dslew-29"></a> 8362b15cb3dSCy SchubertThis is the “slew up to 600 seconds” option. 8372b15cb3dSCy SchubertNormally, 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. 8382b15cb3dSCy SchubertThis option sets the threshold to 600 s, which is well within the accuracy window to set the clock manually. 8392b15cb3dSCy SchubertNote: 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. 8402b15cb3dSCy SchubertThus, an adjustment as much as 600 s will take almost 14 days to complete. 8412b15cb3dSCy SchubertThis option can be used with the 8422b15cb3dSCy Schubert<code>-g</code> 8432b15cb3dSCy Schubertand 8442b15cb3dSCy Schubert<code>-q</code> 8452b15cb3dSCy Schubertoptions. 8462b15cb3dSCy SchubertSee the 8472b15cb3dSCy Schubert<code>tinker</code> 8482b15cb3dSCy Schubertconfiguration file directive for other options. 8492b15cb3dSCy SchubertNote: The kernel time discipline is disabled with this option. 8502b15cb3dSCy Schubert<div class="node"> 8512b15cb3dSCy Schubert<p><hr> 8522b15cb3dSCy Schubert<a name="ntpd-usepcc"></a>Next: <a rel="next" accesskey="n" href="#ntpd-pccfreq">ntpd pccfreq</a>, 8532b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-slew">ntpd slew</a>, 8542b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 8552b15cb3dSCy Schubert<br> 8562b15cb3dSCy Schubert</div> 8572b15cb3dSCy Schubert 8582b15cb3dSCy Schubert<h4 class="subsection">usepcc option</h4> 8592b15cb3dSCy Schubert 860*a25439b6SCy Schubert<p><a name="index-ntpd_002dusepcc-30"></a> 8612b15cb3dSCy SchubertThis is the “use cpu cycle counter (windows only)” option. 8622b15cb3dSCy Schubert 8632b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 8642b15cb3dSCy Schubert <ul> 8652b15cb3dSCy Schubert<li>must be compiled in by defining <code>SYS_WINNT</code> during the compilation. 8662b15cb3dSCy Schubert</ul> 8672b15cb3dSCy Schubert 8682b15cb3dSCy Schubert <p>Attempt to substitute the CPU counter for <code>QueryPerformanceCounter</code>. 8692b15cb3dSCy SchubertThe CPU counter and <code>QueryPerformanceCounter</code> are compared, and if 8702b15cb3dSCy Schubertthey have the same frequency, the CPU counter (RDTSC on x86) is 8712b15cb3dSCy Schubertused directly, saving the overhead of a system call. 8722b15cb3dSCy Schubert<div class="node"> 8732b15cb3dSCy Schubert<p><hr> 8742b15cb3dSCy Schubert<a name="ntpd-pccfreq"></a>Next: <a rel="next" accesskey="n" href="#ntpd-mdns">ntpd mdns</a>, 8752b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-usepcc">ntpd usepcc</a>, 8762b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 8772b15cb3dSCy Schubert<br> 8782b15cb3dSCy Schubert</div> 8792b15cb3dSCy Schubert 8802b15cb3dSCy Schubert<h4 class="subsection">pccfreq option</h4> 8812b15cb3dSCy Schubert 882*a25439b6SCy Schubert<p><a name="index-ntpd_002dpccfreq-31"></a> 8832b15cb3dSCy SchubertThis is the “force cpu cycle counter use (windows only)” option. 8842b15cb3dSCy SchubertThis option takes a string argument. 8852b15cb3dSCy Schubert 8862b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 8872b15cb3dSCy Schubert <ul> 8882b15cb3dSCy Schubert<li>must be compiled in by defining <code>SYS_WINNT</code> during the compilation. 8892b15cb3dSCy Schubert</ul> 8902b15cb3dSCy Schubert 8912b15cb3dSCy Schubert <p>Force substitution the CPU counter for <code>QueryPerformanceCounter</code>. 8922b15cb3dSCy SchubertThe CPU counter (RDTSC on x86) is used unconditionally with the 8932b15cb3dSCy Schubertgiven frequency (in Hz). 8942b15cb3dSCy Schubert<div class="node"> 8952b15cb3dSCy Schubert<p><hr> 8962b15cb3dSCy Schubert<a name="ntpd-mdns"></a>Next: <a rel="next" accesskey="n" href="#ntpd-config">ntpd config</a>, 8972b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-pccfreq">ntpd pccfreq</a>, 8982b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 8992b15cb3dSCy Schubert<br> 9002b15cb3dSCy Schubert</div> 9012b15cb3dSCy Schubert 9022b15cb3dSCy Schubert<h4 class="subsection">mdns option (-m)</h4> 9032b15cb3dSCy Schubert 904*a25439b6SCy Schubert<p><a name="index-ntpd_002dmdns-32"></a> 9052b15cb3dSCy SchubertThis is the “register with mdns as a ntp server” option. 9062b15cb3dSCy Schubert 9072b15cb3dSCy Schubert<p class="noindent">This option has some usage constraints. It: 9082b15cb3dSCy Schubert <ul> 9092b15cb3dSCy Schubert<li>must be compiled in by defining <code>HAVE_DNSREGISTRATION</code> during the compilation. 9102b15cb3dSCy Schubert</ul> 9112b15cb3dSCy Schubert 9122b15cb3dSCy Schubert <p>Registers as an NTP server with the local mDNS server which allows 9132b15cb3dSCy Schubertthe server to be discovered via mDNS client lookup. 9142b15cb3dSCy Schubert 9152b15cb3dSCy Schubert<div class="node"> 9162b15cb3dSCy Schubert<p><hr> 9172b15cb3dSCy Schubert<a name="ntpd-config"></a>Next: <a rel="next" accesskey="n" href="#ntpd-exit-status">ntpd exit status</a>, 9182b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-mdns">ntpd mdns</a>, 9192b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9202b15cb3dSCy Schubert<br> 9212b15cb3dSCy Schubert</div> 9222b15cb3dSCy Schubert 9232b15cb3dSCy Schubert<h4 class="subsection">presetting/configuring ntpd</h4> 9242b15cb3dSCy Schubert 9252b15cb3dSCy Schubert<p>Any option that is not marked as <i>not presettable</i> may be preset by 9262b15cb3dSCy Schubertloading values from environment variables named <code>NTPD</code> and <code>NTPD_<OPTION_NAME></code>. <code><OPTION_NAME></code> must be one of 9272b15cb3dSCy Schubertthe options listed above in upper case and segmented with underscores. 9282b15cb3dSCy SchubertThe <code>NTPD</code> variable will be tokenized and parsed like 9292b15cb3dSCy Schubertthe command line. The remaining variables are tested for existence and their 9302b15cb3dSCy Schubertvalues are treated like option arguments. 9312b15cb3dSCy Schubert 9322b15cb3dSCy Schubert <p>The command line options relating to configuration and/or usage help are: 9332b15cb3dSCy Schubert 9342b15cb3dSCy Schubert<h5 class="subsubheading">version (-)</h5> 9352b15cb3dSCy Schubert 9362b15cb3dSCy Schubert<p>Print the program version to standard out, optionally with licensing 9372b15cb3dSCy Schubertinformation, then exit 0. The optional argument specifies how much licensing 9382b15cb3dSCy Schubertdetail to provide. The default is to print just the version. The licensing infomation may be selected with an option argument. 9392b15cb3dSCy SchubertOnly the first letter of the argument is examined: 9402b15cb3dSCy Schubert 9412b15cb3dSCy Schubert <dl> 9422b15cb3dSCy Schubert<dt><span class="samp">version</span><dd>Only print the version. This is the default. 9432b15cb3dSCy Schubert<br><dt><span class="samp">copyright</span><dd>Name the copyright usage licensing terms. 9442b15cb3dSCy Schubert<br><dt><span class="samp">verbose</span><dd>Print the full copyright usage licensing terms. 9452b15cb3dSCy Schubert</dl> 9462b15cb3dSCy Schubert 9472b15cb3dSCy Schubert<div class="node"> 9482b15cb3dSCy Schubert<p><hr> 9492b15cb3dSCy Schubert<a name="ntpd-exit-status"></a>Next: <a rel="next" accesskey="n" href="#ntpd-Usage">ntpd Usage</a>, 9502b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-config">ntpd config</a>, 9512b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9522b15cb3dSCy Schubert<br> 9532b15cb3dSCy Schubert</div> 9542b15cb3dSCy Schubert 9552b15cb3dSCy Schubert<h4 class="subsection">ntpd exit status</h4> 9562b15cb3dSCy Schubert 9572b15cb3dSCy Schubert<p>One of the following exit values will be returned: 9582b15cb3dSCy Schubert <dl> 9592b15cb3dSCy Schubert<dt><span class="samp">0 (EXIT_SUCCESS)</span><dd>Successful program execution. 9602b15cb3dSCy Schubert<br><dt><span class="samp">1 (EXIT_FAILURE)</span><dd>The operation failed or the command syntax was not valid. 9612b15cb3dSCy Schubert</dl> 9622b15cb3dSCy Schubert <div class="node"> 9632b15cb3dSCy Schubert<p><hr> 9642b15cb3dSCy Schubert<a name="ntpd-Usage"></a>Next: <a rel="next" accesskey="n" href="#ntpd-Files">ntpd Files</a>, 9652b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-exit-status">ntpd exit status</a>, 9662b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9672b15cb3dSCy Schubert<br> 9682b15cb3dSCy Schubert</div> 9692b15cb3dSCy Schubert 9702b15cb3dSCy Schubert<h4 class="subsection">ntpd Usage</h4> 9712b15cb3dSCy Schubert 9722b15cb3dSCy Schubert<div class="node"> 9732b15cb3dSCy Schubert<p><hr> 9742b15cb3dSCy Schubert<a name="ntpd-Files"></a>Next: <a rel="next" accesskey="n" href="#ntpd-See-Also">ntpd See Also</a>, 9752b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-Usage">ntpd Usage</a>, 9762b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9772b15cb3dSCy Schubert<br> 9782b15cb3dSCy Schubert</div> 9792b15cb3dSCy Schubert 9802b15cb3dSCy Schubert<h4 class="subsection">ntpd Files</h4> 9812b15cb3dSCy Schubert 9822b15cb3dSCy Schubert<div class="node"> 9832b15cb3dSCy Schubert<p><hr> 9842b15cb3dSCy Schubert<a name="ntpd-See-Also"></a>Next: <a rel="next" accesskey="n" href="#ntpd-Bugs">ntpd Bugs</a>, 9852b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-Files">ntpd Files</a>, 9862b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9872b15cb3dSCy Schubert<br> 9882b15cb3dSCy Schubert</div> 9892b15cb3dSCy Schubert 9902b15cb3dSCy Schubert<h4 class="subsection">ntpd See Also</h4> 9912b15cb3dSCy Schubert 9922b15cb3dSCy Schubert<div class="node"> 9932b15cb3dSCy Schubert<p><hr> 9942b15cb3dSCy Schubert<a name="ntpd-Bugs"></a>Next: <a rel="next" accesskey="n" href="#ntpd-Notes">ntpd Notes</a>, 9952b15cb3dSCy SchubertPrevious: <a rel="previous" accesskey="p" href="#ntpd-See-Also">ntpd See Also</a>, 9962b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 9972b15cb3dSCy Schubert<br> 9982b15cb3dSCy Schubert</div> 9992b15cb3dSCy Schubert 10002b15cb3dSCy Schubert<h4 class="subsection">ntpd Bugs</h4> 10012b15cb3dSCy Schubert 10022b15cb3dSCy Schubert<div class="node"> 10032b15cb3dSCy Schubert<p><hr> 10042b15cb3dSCy Schubert<a name="ntpd-Notes"></a>Previous: <a rel="previous" accesskey="p" href="#ntpd-Bugs">ntpd Bugs</a>, 10052b15cb3dSCy SchubertUp: <a rel="up" accesskey="u" href="#ntpd-Invocation">ntpd Invocation</a> 10062b15cb3dSCy Schubert<br> 10072b15cb3dSCy Schubert</div> 10082b15cb3dSCy Schubert 10092b15cb3dSCy Schubert<h4 class="subsection">ntpd Notes</h4> 10102b15cb3dSCy Schubert 10112b15cb3dSCy Schubert<div class="node"> 10122b15cb3dSCy Schubert<p><hr> 10132b15cb3dSCy Schubert<a name="Usage"></a> 10142b15cb3dSCy Schubert<br> 10152b15cb3dSCy Schubert</div> 10162b15cb3dSCy Schubert 10172b15cb3dSCy Schubert<!-- node-name, next, previous, up --> 10182b15cb3dSCy Schubert<h3 class="section">Usage</h3> 10192b15cb3dSCy Schubert 1020