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diff --git a/contrib/ntp/ntpdc/ntpdc.html b/contrib/ntp/ntpdc/ntpdc.html new file mode 100644 index 000000000000..c9be00b30975 --- /dev/null +++ b/contrib/ntp/ntpdc/ntpdc.html @@ -0,0 +1,556 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Created by GNU Texinfo 6.6, http://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<title>ntpdc: NTPD Control User’s Manual</title> + +<meta name="description" content="ntpdc: NTPD Control User’s Manual"> +<meta name="keywords" content="ntpdc: NTPD Control User’s Manual"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<link href="#Top" rel="start" title="Top"> +<link href="dir.html#Top" rel="up" title="(dir)"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.indentedblock {margin-right: 0em} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +kbd {font-style: oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +span.nolinebreak {white-space: nowrap} +span.roman {font-family: initial; font-weight: normal} +span.sansserif {font-family: sans-serif; font-weight: normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en"> +<h1 class="settitle" align="center">ntpdc: NTPD Control User’s Manual</h1> + + + + + +<span id="Top"></span><div class="header"> +<p> +Next: <a href="#ntpdc-Description" accesskey="n" rel="next">ntpdc Description</a>, Previous: <a href="dir.html#Top" accesskey="p" rel="prev">(dir)</a>, Up: <a href="dir.html#Top" accesskey="u" rel="up">(dir)</a> </p> +</div> +<span id="ntpdc_003a-NTPD-Control-User-Manual"></span><h1 class="top">ntpdc: NTPD Control User Manual</h1> + +<p>This document describes the use of the NTP Project’s <code>ntpdc</code> program, +that can be used to query a Network Time Protocol (NTP) server and +display the time offset of the system clock relative to the server +clock. Run as root, it can correct the system clock to this offset as +well. It can be run as an interactive command or from a cron job. +</p> +<p>This document applies to version 4.2.8p18 of <code>ntpdc</code>. +</p> +<p>The program implements the SNTP protocol as defined by RFC 5905, the NTPv4 +IETF specification. +</p> +<span id="SEC_Overview"></span> +<h2 class="shortcontents-heading">Short Table of Contents</h2> + +<div class="shortcontents"> +<ul class="no-bullet"> +<li><a id="stoc-Description" href="#toc-Description">1 Description</a></li> +</ul> +</div> + + +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="#ntpdc-Description" accesskey="1">ntpdc Description</a></td><td> </td><td align="left" valign="top">Description +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-Invocation" accesskey="2">ntpdc Invocation</a></td><td> </td><td align="left" valign="top">Invoking ntpdc +</td></tr> +<tr><td align="left" valign="top">• <a href="#Usage" accesskey="3">Usage</a></td><td> </td><td align="left" valign="top">Usage +</td></tr> +</table> + +<hr> +<span id="ntpdc-Description"></span><div class="header"> +<p> +Next: <a href="#ntpdc-Invocation" accesskey="n" rel="next">ntpdc Invocation</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> </p> +</div> +<span id="Description"></span><h2 class="chapter">1 Description</h2> + +<p>By default, <code>ntpdc</code> writes the local data and time (i.e., not UTC) to the +standard output in the format: +</p> +<div class="example"> +<pre class="example">1996-10-15 20:17:25.123 (+0800) +4.567 +/- 0.089 secs +</pre></div> + +<p>where +YYYY-MM-DD HH:MM:SS.SUBSEC is the local date and time, +(+0800) is the local timezone adjustment (so we would add 8 hours and 0 minutes to convert the reported local time to UTC), +and +the +4.567 +/- 0.089 secs indicates the time offset and +error bound of the system clock relative to the server clock. +</p> +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="#ntpdc-Invocation" accesskey="1">Invoking ntpdc</a></td><td> </td><td align="left" valign="top"> +</td></tr> +<tr><td align="left" valign="top">• <a href="#Usage" accesskey="2">Usage</a></td><td> </td><td align="left" valign="top"> +</td></tr> +</table> + +<hr> +<span id="ntpdc-Invocation"></span><div class="header"> +<p> +Next: <a href="#Usage" accesskey="n" rel="next">Usage</a>, Previous: <a href="#ntpdc-Description" accesskey="p" rel="prev">ntpdc Description</a>, Up: <a href="#ntpdc-Description" accesskey="u" rel="up">ntpdc Description</a> </p> +</div> +<span id="Invoking-ntpdc"></span><h3 class="section">1.1 Invoking ntpdc</h3> +<span id="index-ntpdc"></span> +<span id="index-vendor_002dspecific-NTPD-control-program"></span> + + + +<p><code>ntpdc</code> +is deprecated. +Please use +<code>ntpq(1ntpqmdoc)</code> instead - it can do everything +<code>ntpdc</code> +used to do, and it does so using a much more sane interface. +</p> +<p><code>ntpdc</code> +is a utility program used to query +<code>ntpd(1ntpdmdoc)</code> +about its +current state and to request changes in that state. +It uses NTP mode 7 control message formats described in the source code. +The program may +be run either in interactive mode or controlled using command line +arguments. +Extensive state and statistics information is available +through the +<code>ntpdc</code> +interface. +In addition, nearly all the +configuration options which can be specified at startup using +ntpd’s configuration file may also be specified at run time using +<code>ntpdc</code> +</p> +<p>This section was generated by <strong>AutoGen</strong>, +using the <code>agtexi-cmd</code> template and the option descriptions for the <code>ntpdc</code> program. +This software is released under the NTP license, <http://ntp.org/license>. +</p> +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="#ntpdc-usage" accesskey="1">ntpdc usage</a></td><td> </td><td align="left" valign="top">ntpdc help/usage (<samp>--help</samp>) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-ipv4" accesskey="2">ntpdc ipv4</a></td><td> </td><td align="left" valign="top">ipv4 option (-4) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-ipv6" accesskey="3">ntpdc ipv6</a></td><td> </td><td align="left" valign="top">ipv6 option (-6) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-command" accesskey="4">ntpdc command</a></td><td> </td><td align="left" valign="top">command option (-c) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-interactive" accesskey="5">ntpdc interactive</a></td><td> </td><td align="left" valign="top">interactive option (-i) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-listpeers" accesskey="6">ntpdc listpeers</a></td><td> </td><td align="left" valign="top">listpeers option (-l) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-numeric" accesskey="7">ntpdc numeric</a></td><td> </td><td align="left" valign="top">numeric option (-n) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-peers" accesskey="8">ntpdc peers</a></td><td> </td><td align="left" valign="top">peers option (-p) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-showpeers" accesskey="9">ntpdc showpeers</a></td><td> </td><td align="left" valign="top">showpeers option (-s) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-unconnected">ntpdc unconnected</a></td><td> </td><td align="left" valign="top">unconnected option (-u) +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-config">ntpdc config</a></td><td> </td><td align="left" valign="top">presetting/configuring ntpdc +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-exit-status">ntpdc exit status</a></td><td> </td><td align="left" valign="top">exit status +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-Usage">ntpdc Usage</a></td><td> </td><td align="left" valign="top">Usage +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-See-Also">ntpdc See Also</a></td><td> </td><td align="left" valign="top">See Also +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-Authors">ntpdc Authors</a></td><td> </td><td align="left" valign="top">Authors +</td></tr> +<tr><td align="left" valign="top">• <a href="#ntpdc-Bugs">ntpdc Bugs</a></td><td> </td><td align="left" valign="top">Bugs +</td></tr> +</table> + +<hr> +<span id="ntpdc-usage"></span><div class="header"> +<p> +Next: <a href="#ntpdc-ipv4" accesskey="n" rel="next">ntpdc ipv4</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-help_002fusage-_0028_002d_002dhelp_0029"></span><h4 class="subsection">1.1.1 ntpdc help/usage (<samp>--help</samp>)</h4> +<span id="index-ntpdc-help"></span> + +<p>This is the automatically generated usage text for ntpdc. +</p> +<p>The text printed is the same whether selected with the <code>help</code> option +(<samp>--help</samp>) or the <code>more-help</code> option (<samp>--more-help</samp>). <code>more-help</code> will print +the usage text by passing it through a pager program. +<code>more-help</code> is disabled on platforms without a working +<code>fork(2)</code> function. The <code>PAGER</code> environment variable is +used to select the program, defaulting to <samp>more</samp>. Both will exit +with a status code of 0. +</p> +<div class="example"> +<pre class="example">ntpdc - vendor-specific NTPD control program - Ver. 4.2.8p18 +Usage: ntpdc [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [ host ...] + Flg Arg Option-Name Description + -4 no ipv4 Force IPv4 DNS name resolution + - prohibits the option 'ipv6' + -6 no ipv6 Force IPv6 DNS name resolution + - prohibits the option 'ipv4' + -c Str command run a command and exit + - may appear multiple times + -d no debug-level Increase debug verbosity level + - may appear multiple times + -D Num set-debug-level Set the debug verbosity level + - may appear multiple times + -i no interactive Force ntpq to operate in interactive mode + - prohibits these options: + command + listpeers + peers + showpeers + -l no listpeers Print a list of the peers + - prohibits the option 'command' + -n no numeric numeric host addresses + -p no peers Print a list of the peers + - prohibits the option 'command' + -s no showpeers Show a list of the peers + - prohibits the option 'command' + -u no unconnected Use unconnected UDP to communicate with ntpd (default on Windows) + opt version output version information and exit + -? no help display extended usage information and exit + -! no more-help extended usage information passed thru pager + -> opt save-opts save the option state to a config file + -< Str load-opts load options from a config file + - disabled as '--no-load-opts' + - may appear multiple times + +Options are specified by doubled hyphens and their name or by a single +hyphen and the flag character. + + +The following option preset mechanisms are supported: + - reading file $HOME/.ntprc + - reading file ./.ntprc + - examining environment variables named NTPDC_* + +Please send bug reports to: <https://bugs.ntp.org, bugs@ntp.org> +</pre></div> + +<hr> +<span id="ntpdc-ipv4"></span><div class="header"> +<p> +Next: <a href="#ntpdc-ipv6" accesskey="n" rel="next">ntpdc ipv6</a>, Previous: <a href="#ntpdc-usage" accesskey="p" rel="prev">ntpdc usage</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ipv4-option-_0028_002d4_0029"></span><h4 class="subsection">1.1.2 ipv4 option (-4)</h4> +<span id="index-ntpdc_002dipv4"></span> + +<p>This is the “force ipv4 dns name resolution” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +ipv6. +</li></ul> + +<p>Force DNS resolution of following host names on the command line +to the IPv4 namespace. +</p><hr> +<span id="ntpdc-ipv6"></span><div class="header"> +<p> +Next: <a href="#ntpdc-command" accesskey="n" rel="next">ntpdc command</a>, Previous: <a href="#ntpdc-ipv4" accesskey="p" rel="prev">ntpdc ipv4</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ipv6-option-_0028_002d6_0029"></span><h4 class="subsection">1.1.3 ipv6 option (-6)</h4> +<span id="index-ntpdc_002dipv6"></span> + +<p>This is the “force ipv6 dns name resolution” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +ipv4. +</li></ul> + +<p>Force DNS resolution of following host names on the command line +to the IPv6 namespace. +</p><hr> +<span id="ntpdc-command"></span><div class="header"> +<p> +Next: <a href="#ntpdc-interactive" accesskey="n" rel="next">ntpdc interactive</a>, Previous: <a href="#ntpdc-ipv6" accesskey="p" rel="prev">ntpdc ipv6</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="command-option-_0028_002dc_0029"></span><h4 class="subsection">1.1.4 command option (-c)</h4> +<span id="index-ntpdc_002dcommand"></span> + +<p>This is the “run a command and exit” option. +This option takes a string argument <samp>cmd</samp>. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> may appear an unlimited number of times. +</li></ul> + +<p>The following argument is interpreted as an interactive format command +and is added to the list of commands to be executed on the specified +host(s). +</p><hr> +<span id="ntpdc-interactive"></span><div class="header"> +<p> +Next: <a href="#ntpdc-listpeers" accesskey="n" rel="next">ntpdc listpeers</a>, Previous: <a href="#ntpdc-command" accesskey="p" rel="prev">ntpdc command</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="interactive-option-_0028_002di_0029"></span><h4 class="subsection">1.1.5 interactive option (-i)</h4> +<span id="index-ntpdc_002dinteractive"></span> + +<p>This is the “force ntpq to operate in interactive mode” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +command, listpeers, peers, showpeers. +</li></ul> + +<p>Force ntpq to operate in interactive mode. Prompts will be written +to the standard output and commands read from the standard input. +</p><hr> +<span id="ntpdc-listpeers"></span><div class="header"> +<p> +Next: <a href="#ntpdc-numeric" accesskey="n" rel="next">ntpdc numeric</a>, Previous: <a href="#ntpdc-interactive" accesskey="p" rel="prev">ntpdc interactive</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="listpeers-option-_0028_002dl_0029"></span><h4 class="subsection">1.1.6 listpeers option (-l)</h4> +<span id="index-ntpdc_002dlistpeers"></span> + +<p>This is the “print a list of the peers” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +command. +</li></ul> + +<p>Print a list of the peers known to the server as well as a summary of +their state. This is equivalent to the ’listpeers’ interactive command. +</p><hr> +<span id="ntpdc-numeric"></span><div class="header"> +<p> +Next: <a href="#ntpdc-peers" accesskey="n" rel="next">ntpdc peers</a>, Previous: <a href="#ntpdc-listpeers" accesskey="p" rel="prev">ntpdc listpeers</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="numeric-option-_0028_002dn_0029"></span><h4 class="subsection">1.1.7 numeric option (-n)</h4> +<span id="index-ntpdc_002dnumeric"></span> + +<p>This is the “numeric host addresses” option. +Output all host addresses in dotted-quad numeric format rather than +converting to the canonical host names. +</p><hr> +<span id="ntpdc-peers"></span><div class="header"> +<p> +Next: <a href="#ntpdc-showpeers" accesskey="n" rel="next">ntpdc showpeers</a>, Previous: <a href="#ntpdc-numeric" accesskey="p" rel="prev">ntpdc numeric</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="peers-option-_0028_002dp_0029"></span><h4 class="subsection">1.1.8 peers option (-p)</h4> +<span id="index-ntpdc_002dpeers"></span> + +<p>This is the “print a list of the peers” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +command. +</li></ul> + +<p>Print a list of the peers known to the server as well as a summary +of their state. This is equivalent to the ’peers’ interactive command. +</p><hr> +<span id="ntpdc-showpeers"></span><div class="header"> +<p> +Next: <a href="#ntpdc-unconnected" accesskey="n" rel="next">ntpdc unconnected</a>, Previous: <a href="#ntpdc-peers" accesskey="p" rel="prev">ntpdc peers</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="showpeers-option-_0028_002ds_0029"></span><h4 class="subsection">1.1.9 showpeers option (-s)</h4> +<span id="index-ntpdc_002dshowpeers"></span> + +<p>This is the “show a list of the peers” option. +</p> +<p>This option has some usage constraints. It: +</p><ul> +<li> must not appear in combination with any of the following options: +command. +</li></ul> + +<p>Print a list of the peers known to the server as well as a summary +of their state. This is equivalent to the ’dmpeers’ interactive command. +</p><hr> +<span id="ntpdc-unconnected"></span><div class="header"> +<p> +Next: <a href="#ntpdc-config" accesskey="n" rel="next">ntpdc config</a>, Previous: <a href="#ntpdc-showpeers" accesskey="p" rel="prev">ntpdc showpeers</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="unconnected-option-_0028_002du_0029"></span><h4 class="subsection">1.1.10 unconnected option (-u)</h4> +<span id="index-ntpdc_002dunconnected"></span> + +<p>This is the “use unconnected udp to communicate with ntpd (default on windows)” option. +Open an unconnected UDP association to ntpd (the default +on Windows). +</p> + +<hr> +<span id="ntpdc-config"></span><div class="header"> +<p> +Next: <a href="#ntpdc-exit-status" accesskey="n" rel="next">ntpdc exit status</a>, Previous: <a href="#ntpdc-unconnected" accesskey="p" rel="prev">ntpdc unconnected</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="presetting_002fconfiguring-ntpdc"></span><h4 class="subsection">1.1.11 presetting/configuring ntpdc</h4> + +<p>Any option that is not marked as <i>not presettable</i> may be preset by +loading values from configuration ("rc" or "ini") files, and values from environment variables named <code>NTPDC</code> and <code>NTPDC_<OPTION_NAME></code>. <code><OPTION_NAME></code> must be one of +the options listed above in upper case and segmented with underscores. +The <code>NTPDC</code> variable will be tokenized and parsed like +the command line. The remaining variables are tested for existence and their +values are treated like option arguments. +</p> + +<p><code>libopts</code> will search in 2 places for configuration files: +</p><ul> +<li> $HOME +</li><li> $PWD +</li></ul> +<p>The environment variables <code>HOME</code>, and <code>PWD</code> +are expanded and replaced when <samp>ntpdc</samp> runs. +For any of these that are plain files, they are simply processed. +For any that are directories, then a file named <samp>.ntprc</samp> is searched for +within that directory and processed. +</p> +<p>Configuration files may be in a wide variety of formats. +The basic format is an option name followed by a value (argument) on the +same line. Values may be separated from the option name with a colon, +equal sign or simply white space. Values may be continued across multiple +lines by escaping the newline with a backslash. +</p> +<p>Multiple programs may also share the same initialization file. +Common options are collected at the top, followed by program specific +segments. The segments are separated by lines like: +</p><div class="example"> +<pre class="example">[NTPDC] +</pre></div> +<p>or by +</p><div class="example"> +<pre class="example"><?program ntpdc> +</pre></div> +<p>Do not mix these styles within one configuration file. +</p> +<p>Compound values and carefully constructed string values may also be +specified using XML syntax: +</p><div class="example"> +<pre class="example"><option-name> + <sub-opt>...&lt;...&gt;...</sub-opt> +</option-name> +</pre></div> +<p>yielding an <code>option-name.sub-opt</code> string value of +</p><div class="example"> +<pre class="example">"...<...>..." +</pre></div> +<p><code>AutoOpts</code> does not track suboptions. You simply note that it is a +hierarchicly valued option. <code>AutoOpts</code> does provide a means for searching +the associated name/value pair list (see: optionFindValue). +</p> +<p>The command line options relating to configuration and/or usage help are: +</p> +<span id="version-_0028_002d_0029"></span><h4 class="subsubheading">version (-)</h4> + +<p>Print the program version to standard out, optionally with licensing +information, then exit 0. The optional argument specifies how much licensing +detail to provide. The default is to print just the version. The licensing information may be selected with an option argument. +Only the first letter of the argument is examined: +</p> +<dl compact="compact"> +<dt>‘<samp>version</samp>’</dt> +<dd><p>Only print the version. This is the default. +</p></dd> +<dt>‘<samp>copyright</samp>’</dt> +<dd><p>Name the copyright usage licensing terms. +</p></dd> +<dt>‘<samp>verbose</samp>’</dt> +<dd><p>Print the full copyright usage licensing terms. +</p></dd> +</dl> + +<hr> +<span id="ntpdc-exit-status"></span><div class="header"> +<p> +Next: <a href="#ntpdc-Usage" accesskey="n" rel="next">ntpdc Usage</a>, Previous: <a href="#ntpdc-config" accesskey="p" rel="prev">ntpdc config</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-exit-status-1"></span><h4 class="subsection">1.1.12 ntpdc exit status</h4> + +<p>One of the following exit values will be returned: +</p><dl compact="compact"> +<dt>‘<samp>0 (EXIT_SUCCESS)</samp>’</dt> +<dd><p>Successful program execution. +</p></dd> +<dt>‘<samp>1 (EXIT_FAILURE)</samp>’</dt> +<dd><p>The operation failed or the command syntax was not valid. +</p></dd> +<dt>‘<samp>66 (EX_NOINPUT)</samp>’</dt> +<dd><p>A specified configuration file could not be loaded. +</p></dd> +<dt>‘<samp>70 (EX_SOFTWARE)</samp>’</dt> +<dd><p>libopts had an internal operational error. Please report +it to autogen-users@lists.sourceforge.net. Thank you. +</p></dd> +</dl> +<hr> +<span id="ntpdc-Usage"></span><div class="header"> +<p> +Next: <a href="#ntpdc-See-Also" accesskey="n" rel="next">ntpdc See Also</a>, Previous: <a href="#ntpdc-exit-status" accesskey="p" rel="prev">ntpdc exit status</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-Usage-1"></span><h4 class="subsection">1.1.13 ntpdc Usage</h4> +<hr> +<span id="ntpdc-See-Also"></span><div class="header"> +<p> +Next: <a href="#ntpdc-Authors" accesskey="n" rel="next">ntpdc Authors</a>, Previous: <a href="#ntpdc-Usage" accesskey="p" rel="prev">ntpdc Usage</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-See-Also-1"></span><h4 class="subsection">1.1.14 ntpdc See Also</h4> +<hr> +<span id="ntpdc-Authors"></span><div class="header"> +<p> +Next: <a href="#ntpdc-Bugs" accesskey="n" rel="next">ntpdc Bugs</a>, Previous: <a href="#ntpdc-See-Also" accesskey="p" rel="prev">ntpdc See Also</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-Authors-1"></span><h4 class="subsection">1.1.15 ntpdc Authors</h4> +<hr> +<span id="ntpdc-Bugs"></span><div class="header"> +<p> +Previous: <a href="#ntpdc-Authors" accesskey="p" rel="prev">ntpdc Authors</a>, Up: <a href="#ntpdc-Invocation" accesskey="u" rel="up">ntpdc Invocation</a> </p> +</div> +<span id="ntpdc-Bugs-1"></span><h4 class="subsection">1.1.16 ntpdc Bugs</h4> + +<hr> +<span id="Usage"></span><div class="header"> +<p> +Previous: <a href="#ntpdc-Invocation" accesskey="p" rel="prev">ntpdc Invocation</a>, Up: <a href="#ntpdc-Description" accesskey="u" rel="up">ntpdc Description</a> </p> +</div> +<span id="Usage-1"></span><h3 class="section">1.2 Usage</h3> + +<p>The simplest use of this program is as an unprivileged command to +check the current time, offset, and error in the local clock. +For example: +</p> +<div class="example"> +<pre class="example">ntpdc ntpserver.somewhere +</pre></div> + +<p>With suitable privilege, it can be run as a command or in a +<code>cron</code> job to reset the local clock from a reliable server, like +the <code>ntpdate</code> and <code>rdate</code> commands. +For example: +</p> +<div class="example"> +<pre class="example">ntpdc -a ntpserver.somewhere +</pre></div> +<hr> + + + +</body> +</html> |