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Security: CVE-2015-7973, CVE-2015-7974, CVE-2015-7975 Security: CVE-2015-7976, CVE-2015-7977, CVE-2015-7978 Security: CVE-2015-7979, CVE-2015-8138, CVE-2015-8139 Security: CVE-2015-8140, CVE-2015-8158 With hat: so
181 lines
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181 lines
7.9 KiB
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<title>Ntptrace User's Manual</title>
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<h1 class="settitle">Ntptrace User's Manual</h1>
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<div class="node">
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<p><hr>
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<a name="Top"></a>Next: <a rel="next" accesskey="n" href="#ntptrace-Description">ntptrace Description</a>,
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Previous: <a rel="previous" accesskey="p" href="#dir">(dir)</a>,
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Up: <a rel="up" accesskey="u" href="#dir">(dir)</a>
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<br>
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</div>
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<h2 class="unnumbered">Simple Network Time Protocol User Manual</h2>
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<p>This document describes the use of the NTP Project's <code>ntptrace</code> program.
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This document applies to version 4.2.8p6 of <code>ntptrace</code>.
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<div class="shortcontents">
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<h2>Short Contents</h2>
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<ul>
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<a href="#Top">Simple Network Time Protocol User Manual</a>
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</ul>
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</div>
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<ul class="menu">
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<li><a accesskey="1" href="#ntptrace-Description">ntptrace Description</a>: Description
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<li><a accesskey="2" href="#ntptrace-Invocation">ntptrace Invocation</a>: Invoking ntptrace
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</ul>
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<div class="node">
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<p><hr>
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<a name="ntptrace-Invocation"></a>Previous: <a rel="previous" accesskey="p" href="#ntptrace-Description">ntptrace Description</a>,
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Up: <a rel="up" accesskey="u" href="#Top">Top</a>
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<br>
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</div>
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<h3 class="section">Invoking ntptrace</h3>
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<p><a name="index-ntptrace-1"></a><a name="index-Trace-peers-of-an-NTP-server-2"></a>
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<code>ntptrace</code> is a perl script that uses the ntpq utility program to follow
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the chain of NTP servers from a given host back to the primary time source. For
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ntptrace to work properly, each of these servers must implement the NTP Control
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and Monitoring Protocol specified in RFC 1305 and enable NTP Mode 6 packets.
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<p>If given no arguments, ntptrace starts with localhost. Here is an example of
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the output from ntptrace:
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<pre class="example"> % ntptrace localhost: stratum 4, offset 0.0019529, synch distance 0.144135
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server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784 usndh.edu:
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stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
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</pre>
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<p>On each line, the fields are (left to right): the host name, the host stratum,
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the time offset between that host and the local host (as measured by
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<code>ntptrace</code>; this is why it is not always zero for "localhost"), the host
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synchronization distance, and (only for stratum-1 servers) the reference clock
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ID. All times are given in seconds. Note that the stratum is the server hop
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count to the primary source, while the synchronization distance is the
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estimated error relative to the primary source. These terms are precisely
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defined in RFC-1305.
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<p>This section was generated by <strong>AutoGen</strong>,
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using the <code>agtexi-cmd</code> template and the option descriptions for the <code>ntptrace</code> program.
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<ul class="menu">
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<li><a accesskey="1" href="#ntptrace-usage">ntptrace usage</a>: ntptrace help/usage (<span class="option">--help</span>)
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<li><a accesskey="2" href="#ntptrace-numeric">ntptrace numeric</a>: numeric option (-n)
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<li><a accesskey="3" href="#ntptrace-max_002dhosts">ntptrace max-hosts</a>: max-hosts option (-m)
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<li><a accesskey="4" href="#ntptrace-host">ntptrace host</a>: host option (-r)
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<li><a accesskey="5" href="#ntptrace-exit-status">ntptrace exit status</a>: exit status
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</ul>
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<div class="node">
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<p><hr>
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<a name="ntptrace-usage"></a>Next: <a rel="next" accesskey="n" href="#ntptrace-numeric">ntptrace numeric</a>,
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Up: <a rel="up" accesskey="u" href="#ntptrace-Invocation">ntptrace Invocation</a>
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<br>
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</div>
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<h4 class="subsection">ntptrace help/usage (<span class="option">--help</span>)</h4>
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<p><a name="index-ntptrace-help-3"></a>
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This is the automatically generated usage text for ntptrace.
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<p>The text printed is the same whether selected with the <code>help</code> option
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(<span class="option">--help</span>) or the <code>more-help</code> option (<span class="option">--more-help</span>). <code>more-help</code> will print
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the usage text by passing it through a pager program.
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<code>more-help</code> is disabled on platforms without a working
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<code>fork(2)</code> function. The <code>PAGER</code> environment variable is
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used to select the program, defaulting to <span class="file">more</span>. Both will exit
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with a status code of 0.
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<pre class="example">ntptrace - Trace peers of an NTP server - Ver. 4.2.8p6
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USAGE: ntptrace [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [host]
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-n, --numeric Print IP addresses instead of hostnames
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-m, --max-hosts=num Maximum number of peers to trace
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-r, --host=str Single remote host
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-?, --help Display usage information and exit
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--more-help Pass the extended usage text through a pager
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Options are specified by doubled hyphens and their name or by a single
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hyphen and the flag character.
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</pre>
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<div class="node">
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<p><hr>
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<a name="ntptrace-numeric"></a>Next: <a rel="next" accesskey="n" href="#ntptrace-max_002dhosts">ntptrace max-hosts</a>,
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Previous: <a rel="previous" accesskey="p" href="#ntptrace-usage">ntptrace usage</a>,
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Up: <a rel="up" accesskey="u" href="#ntptrace-Invocation">ntptrace Invocation</a>
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<br>
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</div>
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<h4 class="subsection">numeric option (-n)</h4>
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<p><a name="index-ntptrace_002dnumeric-4"></a>
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This is the “print ip addresses instead of hostnames” option.
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Output hosts as dotted-quad numeric format rather than converting to
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the canonical host names.
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<div class="node">
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<p><hr>
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<a name="ntptrace-max_002dhosts"></a>Next: <a rel="next" accesskey="n" href="#ntptrace-host">ntptrace host</a>,
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Previous: <a rel="previous" accesskey="p" href="#ntptrace-numeric">ntptrace numeric</a>,
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Up: <a rel="up" accesskey="u" href="#ntptrace-Invocation">ntptrace Invocation</a>
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<br>
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</div>
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<h4 class="subsection">max-hosts option (-m)</h4>
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<p><a name="index-ntptrace_002dmax_002dhosts-5"></a>
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This is the “maximum number of peers to trace” option.
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This option takes a number argument.
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This option has no <span class="samp">doc</span> documentation.
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<div class="node">
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<p><hr>
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<a name="ntptrace-host"></a>Next: <a rel="next" accesskey="n" href="#ntptrace-exit-status">ntptrace exit status</a>,
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Previous: <a rel="previous" accesskey="p" href="#ntptrace-max_002dhosts">ntptrace max-hosts</a>,
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Up: <a rel="up" accesskey="u" href="#ntptrace-Invocation">ntptrace Invocation</a>
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<br>
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</div>
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<h4 class="subsection">host option (-r)</h4>
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<p><a name="index-ntptrace_002dhost-6"></a>
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This is the “single remote host” option.
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This option takes a string argument.
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This option has no <span class="samp">doc</span> documentation.
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<div class="node">
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<p><hr>
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<a name="ntptrace-exit-status"></a>Previous: <a rel="previous" accesskey="p" href="#ntptrace-host">ntptrace host</a>,
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Up: <a rel="up" accesskey="u" href="#ntptrace-Invocation">ntptrace Invocation</a>
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<br>
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</div>
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<h4 class="subsection">ntptrace exit status</h4>
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<p>One of the following exit values will be returned:
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<dl>
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<dt><span class="samp">0 (EXIT_SUCCESS)</span><dd>Successful program execution.
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<br><dt><span class="samp">1 (EXIT_FAILURE)</span><dd>The operation failed or the command syntax was not valid.
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</dl>
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</body></html>
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