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1 1.1 christos <html lang="en"> 2 1.1 christos <head> 3 1.1 christos <title>ntpdc: NTPD Control User's Manual</title> 4 1.1 christos <meta http-equiv="Content-Type" content="text/html"> 5 1.1 christos <meta name="description" content="ntpdc: NTPD Control User's Manual"> 6 1.1 christos <meta name="generator" content="makeinfo 4.7"> 7 1.1 christos <link title="Top" rel="top" href="#Top"> 8 1.1 christos <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 9 1.1 christos <meta http-equiv="Content-Style-Type" content="text/css"> 10 1.1 christos <style type="text/css"><!-- 11 1.1 christos pre.display { font-family:inherit } 12 1.1 christos pre.format { font-family:inherit } 13 1.1 christos pre.smalldisplay { font-family:inherit; font-size:smaller } 14 1.1 christos pre.smallformat { font-family:inherit; font-size:smaller } 15 1.1 christos pre.smallexample { font-size:smaller } 16 1.1 christos pre.smalllisp { font-size:smaller } 17 1.1 christos span.sc { font-variant:small-caps } 18 1.1 christos span.roman { font-family: serif; font-weight: normal; } 19 1.1 christos --></style> 20 1.1 christos </head> 21 1.1 christos <body> 22 1.1 christos <h1 class="settitle">ntpdc: NTPD Control User's Manual</h1> 23 1.1 christos <div class="node"> 24 1.1 christos <p><hr> 25 1.1 christos <a name="Top"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-Description">ntpdc Description</a>, 26 1.1 christos Previous: <a rel="previous" accesskey="p" href="#dir">(dir)</a>, 27 1.1 christos Up: <a rel="up" accesskey="u" href="#dir">(dir)</a> 28 1.1 christos <br> 29 1.1 christos </div> 30 1.1 christos 31 1.1 christos <h2 class="unnumbered">ntpdc: NTPD Control User Manual</h2> 32 1.1 christos 33 1.1 christos <p>This document describes the use of the NTP Project's <code>ntpdc</code> program, 34 1.1 christos that can be used to query a Network Time Protocol (NTP) server and 35 1.1 christos display the time offset of the system clock relative to the server 36 1.1 christos clock. Run as root, it can correct the system clock to this offset as 37 1.1 christos well. It can be run as an interactive command or from a cron job. 38 1.1 christos 39 1.1 christos <p>This document applies to version 4.2.7p404 of <code>ntpdc</code>. 40 1.1 christos 41 1.1 christos <p>The program implements the SNTP protocol as defined by RFC 5905, the NTPv4 42 1.1 christos IETF specification. 43 1.1 christos 44 1.1 christos <div class="shortcontents"> 45 1.1 christos <h2>Short Contents</h2> 46 1.1 christos <ul> 47 1.1 christos <a href="#Top">ntpdc: NTPD Control User Manual</a> 48 1.1 christos </ul> 49 1.1 christos </div> 50 1.1 christos 51 1.1 christos <ul class="menu"> 52 1.1 christos <li><a accesskey="1" href="#ntpdc-Description">ntpdc Description</a>: Description 53 1.1 christos <li><a accesskey="2" href="#ntpdc-Invocation">ntpdc Invocation</a>: Invoking ntpdc 54 1.1 christos <li><a accesskey="3" href="#Usage">Usage</a>: Usage 55 1.1 christos </ul> 56 1.1 christos 57 1.1 christos <div class="node"> 58 1.1 christos <p><hr> 59 1.1 christos <a name="ntpdc-Description"></a> 60 1.1 christos <br> 61 1.1 christos </div> 62 1.1 christos 63 1.1 christos <!-- node-name, next, previous, up --> 64 1.1 christos <h3 class="section">Description</h3> 65 1.1 christos 66 1.1 christos <p>By default, <code>ntpdc</code> writes the local data and time (i.e., not UTC) to the 67 1.1 christos standard output in the format: 68 1.1 christos 69 1.1 christos <pre class="example"> 1996-10-15 20:17:25.123 (+0800) +4.567 +/- 0.089 secs 70 1.1 christos </pre> 71 1.1 christos <p>where 72 1.1 christos YYYY-MM-DD HH:MM:SS.SUBSEC is the local date and time, 73 1.1 christos (+0800) is the local timezone adjustment (so we would add 8 hours and 0 minutes to convert the reported local time to UTC), 74 1.1 christos and 75 1.1 christos the +4.567 +/- 0.089 secs indicates the time offset and 76 1.1 christos error bound of the system clock relative to the server clock. 77 1.1 christos 78 1.1 christos <div class="node"> 79 1.1 christos <p><hr> 80 1.1 christos <a name="ntpdc-Invocation"></a> 81 1.1 christos <br> 82 1.1 christos </div> 83 1.1 christos 84 1.1 christos <h3 class="section">Invoking ntpdc</h3> 85 1.1 christos 86 1.1 christos <p><a name="index-ntpdc-1"></a><a name="index-vendor_002dspecific-NTPD-control-program-2"></a> 87 1.1 christos 88 1.1 christos <p><code>ntpdc</code> 89 1.1 christos is a utility program used to query 90 1.1 christos <code>ntpd(1ntpdmdoc)</code> 91 1.1 christos about its 92 1.1 christos current state and to request changes in that state. 93 1.1 christos It uses NTP mode 7 control message formats described in the source code. 94 1.1 christos The program may 95 1.1 christos be run either in interactive mode or controlled using command line 96 1.1 christos arguments. 97 1.1 christos Extensive state and statistics information is available 98 1.1 christos through the 99 1.1 christos <code>ntpdc</code> 100 1.1 christos interface. 101 1.1 christos In addition, nearly all the 102 1.1 christos configuration options which can be specified at startup using 103 1.1 christos ntpd's configuration file may also be specified at run time using 104 1.1 christos <code>ntpdc</code> 105 1.1 christos 106 1.1 christos <p>This section was generated by <strong>AutoGen</strong>, 107 1.1 christos using the <code>agtexi-cmd</code> template and the option descriptions for the <code>ntpdc</code> program. 108 1.1 christos This software is released under the NTP license, <http://ntp.org/license>;. 109 1.1 christos 110 1.1 christos <ul class="menu"> 111 1.1 christos <li><a accesskey="1" href="#ntpdc-usage">ntpdc usage</a>: ntpdc help/usage (<span class="option">--help</span>) 112 1.1 christos <li><a accesskey="2" href="#ntpdc-ipv4">ntpdc ipv4</a>: ipv4 option (-4) 113 1.1 christos <li><a accesskey="3" href="#ntpdc-ipv6">ntpdc ipv6</a>: ipv6 option (-6) 114 1.1 christos <li><a accesskey="4" href="#ntpdc-command">ntpdc command</a>: command option (-c) 115 1.1 christos <li><a accesskey="5" href="#ntpdc-interactive">ntpdc interactive</a>: interactive option (-i) 116 1.1 christos <li><a accesskey="6" href="#ntpdc-listpeers">ntpdc listpeers</a>: listpeers option (-l) 117 1.1 christos <li><a accesskey="7" href="#ntpdc-numeric">ntpdc numeric</a>: numeric option (-n) 118 1.1 christos <li><a accesskey="8" href="#ntpdc-peers">ntpdc peers</a>: peers option (-p) 119 1.1 christos <li><a accesskey="9" href="#ntpdc-showpeers">ntpdc showpeers</a>: showpeers option (-s) 120 1.1 christos <li><a href="#ntpdc-config">ntpdc config</a>: presetting/configuring ntpdc 121 1.1 christos <li><a href="#ntpdc-exit-status">ntpdc exit status</a>: exit status 122 1.1 christos <li><a href="#ntpdc-Usage">ntpdc Usage</a>: Usage 123 1.1 christos <li><a href="#ntpdc-See-Also">ntpdc See Also</a>: See Also 124 1.1 christos <li><a href="#ntpdc-Authors">ntpdc Authors</a>: Authors 125 1.1 christos <li><a href="#ntpdc-Bugs">ntpdc Bugs</a>: Bugs 126 1.1 christos </ul> 127 1.1 christos 128 1.1 christos <div class="node"> 129 1.1 christos <p><hr> 130 1.1 christos <a name="ntpdc-usage"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-ipv4">ntpdc ipv4</a>, 131 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 132 1.1 christos <br> 133 1.1 christos </div> 134 1.1 christos 135 1.1 christos <h4 class="subsection">ntpdc help/usage (<span class="option">--help</span>)</h4> 136 1.1 christos 137 1.1 christos <p><a name="index-ntpdc-help-3"></a> 138 1.1 christos This is the automatically generated usage text for ntpdc. 139 1.1 christos 140 1.1 christos <p>The text printed is the same whether selected with the <code>help</code> option 141 1.1 christos (<span class="option">--help</span>) or the <code>more-help</code> option (<span class="option">--more-help</span>). <code>more-help</code> will print 142 1.1 christos the usage text by passing it through a pager program. 143 1.1 christos <code>more-help</code> is disabled on platforms without a working 144 1.1 christos <code>fork(2)</code> function. The <code>PAGER</code> environment variable is 145 1.1 christos used to select the program, defaulting to <span class="file">more</span>. Both will exit 146 1.1 christos with a status code of 0. 147 1.1 christos 148 1.1 christos <pre class="example">ntpdc - vendor-specific NTPD control program - Ver. 4.2.7p404 149 1.1 christos Usage: ntpdc [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [ host ...] 150 1.1 christos Flg Arg Option-Name Description 151 1.1 christos -4 no ipv4 Force IPv4 DNS name resolution 152 1.1 christos - prohibits the option 'ipv6' 153 1.1 christos -6 no ipv6 Force IPv6 DNS name resolution 154 1.1 christos - prohibits the option 'ipv4' 155 1.1 christos -c Str command run a command and exit 156 1.1 christos - may appear multiple times 157 1.1 christos -d no debug-level Increase debug verbosity level 158 1.1 christos - may appear multiple times 159 1.1 christos -D Num set-debug-level Set the debug verbosity level 160 1.1 christos - may appear multiple times 161 1.1 christos -i no interactive Force ntpq to operate in interactive mode 162 1.1 christos - prohibits these options: 163 1.1 christos command 164 1.1 christos listpeers 165 1.1 christos peers 166 1.1 christos showpeers 167 1.1 christos -l no listpeers Print a list of the peers 168 1.1 christos - prohibits the option 'command' 169 1.1 christos -n no numeric numeric host addresses 170 1.1 christos -p no peers Print a list of the peers 171 1.1 christos - prohibits the option 'command' 172 1.1 christos -s no showpeers Show a list of the peers 173 1.1 christos - prohibits the option 'command' 174 1.1 christos opt version output version information and exit 175 1.1 christos -? no help display extended usage information and exit 176 1.1 christos -! no more-help extended usage information passed thru pager 177 1.1 christos -> opt save-opts save the option state to a config file 178 1.1 christos -< Str load-opts load options from a config file 179 1.1 christos - disabled as '--no-load-opts' 180 1.1 christos - may appear multiple times 181 1.1 christos 182 1.1 christos Options are specified by doubled hyphens and their name or by a single 183 1.1 christos hyphen and the flag character. 184 1.1 christos 185 1.1 christos 186 1.1 christos The following option preset mechanisms are supported: 187 1.1 christos - reading file $HOME/.ntprc 188 1.1 christos - reading file ./.ntprc 189 1.1 christos - examining environment variables named NTPDC_* 190 1.1 christos 191 1.1 christos Please send bug reports to: <http://bugs.ntp.org, bugs (a] ntp.org> 192 1.1 christos 193 1.1 christos exit 0 194 1.1 christos </pre> 195 1.1 christos <div class="node"> 196 1.1 christos <p><hr> 197 1.1 christos <a name="ntpdc-ipv4"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-ipv6">ntpdc ipv6</a>, 198 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-usage">ntpdc usage</a>, 199 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 200 1.1 christos <br> 201 1.1 christos </div> 202 1.1 christos 203 1.1 christos <h4 class="subsection">ipv4 option (-4)</h4> 204 1.1 christos 205 1.1 christos <p><a name="index-ntpdc_002dipv4-4"></a> 206 1.1 christos This is the “force ipv4 dns name resolution” option. 207 1.1 christos 208 1.1 christos <p class="noindent">This option has some usage constraints. It: 209 1.1 christos <ul> 210 1.1 christos <li>must not appear in combination with any of the following options: 211 1.1 christos ipv6. 212 1.1 christos </ul> 213 1.1 christos 214 1.1 christos <p>Force DNS resolution of following host names on the command line 215 1.1 christos to the IPv4 namespace. 216 1.1 christos <div class="node"> 217 1.1 christos <p><hr> 218 1.1 christos <a name="ntpdc-ipv6"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-command">ntpdc command</a>, 219 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-ipv4">ntpdc ipv4</a>, 220 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 221 1.1 christos <br> 222 1.1 christos </div> 223 1.1 christos 224 1.1 christos <h4 class="subsection">ipv6 option (-6)</h4> 225 1.1 christos 226 1.1 christos <p><a name="index-ntpdc_002dipv6-5"></a> 227 1.1 christos This is the “force ipv6 dns name resolution” option. 228 1.1 christos 229 1.1 christos <p class="noindent">This option has some usage constraints. It: 230 1.1 christos <ul> 231 1.1 christos <li>must not appear in combination with any of the following options: 232 1.1 christos ipv4. 233 1.1 christos </ul> 234 1.1 christos 235 1.1 christos <p>Force DNS resolution of following host names on the command line 236 1.1 christos to the IPv6 namespace. 237 1.1 christos <div class="node"> 238 1.1 christos <p><hr> 239 1.1 christos <a name="ntpdc-command"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-interactive">ntpdc interactive</a>, 240 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-ipv6">ntpdc ipv6</a>, 241 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 242 1.1 christos <br> 243 1.1 christos </div> 244 1.1 christos 245 1.1 christos <h4 class="subsection">command option (-c)</h4> 246 1.1 christos 247 1.1 christos <p><a name="index-ntpdc_002dcommand-6"></a> 248 1.1 christos This is the “run a command and exit” option. 249 1.1 christos This option takes a string argument <span class="file">cmd</span>. 250 1.1 christos 251 1.1 christos <p class="noindent">This option has some usage constraints. It: 252 1.1 christos <ul> 253 1.1 christos <li>may appear an unlimited number of times. 254 1.1 christos </ul> 255 1.1 christos 256 1.1 christos <p>The following argument is interpreted as an interactive format command 257 1.1 christos and is added to the list of commands to be executed on the specified 258 1.1 christos host(s). 259 1.1 christos <div class="node"> 260 1.1 christos <p><hr> 261 1.1 christos <a name="ntpdc-interactive"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-listpeers">ntpdc listpeers</a>, 262 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-command">ntpdc command</a>, 263 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 264 1.1 christos <br> 265 1.1 christos </div> 266 1.1 christos 267 1.1 christos <h4 class="subsection">interactive option (-i)</h4> 268 1.1 christos 269 1.1 christos <p><a name="index-ntpdc_002dinteractive-7"></a> 270 1.1 christos This is the “force ntpq to operate in interactive mode” option. 271 1.1 christos 272 1.1 christos <p class="noindent">This option has some usage constraints. It: 273 1.1 christos <ul> 274 1.1 christos <li>must not appear in combination with any of the following options: 275 1.1 christos command, listpeers, peers, showpeers. 276 1.1 christos </ul> 277 1.1 christos 278 1.1 christos <p>Force ntpq to operate in interactive mode. Prompts will be written 279 1.1 christos to the standard output and commands read from the standard input. 280 1.1 christos <div class="node"> 281 1.1 christos <p><hr> 282 1.1 christos <a name="ntpdc-listpeers"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-numeric">ntpdc numeric</a>, 283 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-interactive">ntpdc interactive</a>, 284 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 285 1.1 christos <br> 286 1.1 christos </div> 287 1.1 christos 288 1.1 christos <h4 class="subsection">listpeers option (-l)</h4> 289 1.1 christos 290 1.1 christos <p><a name="index-ntpdc_002dlistpeers-8"></a> 291 1.1 christos This is the “print a list of the peers” option. 292 1.1 christos 293 1.1 christos <p class="noindent">This option has some usage constraints. It: 294 1.1 christos <ul> 295 1.1 christos <li>must not appear in combination with any of the following options: 296 1.1 christos command. 297 1.1 christos </ul> 298 1.1 christos 299 1.1 christos <p>Print a list of the peers known to the server as well as a summary of 300 1.1 christos their state. This is equivalent to the 'listpeers' interactive command. 301 1.1 christos <div class="node"> 302 1.1 christos <p><hr> 303 1.1 christos <a name="ntpdc-numeric"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-peers">ntpdc peers</a>, 304 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-listpeers">ntpdc listpeers</a>, 305 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 306 1.1 christos <br> 307 1.1 christos </div> 308 1.1 christos 309 1.1 christos <h4 class="subsection">numeric option (-n)</h4> 310 1.1 christos 311 1.1 christos <p><a name="index-ntpdc_002dnumeric-9"></a> 312 1.1 christos This is the “numeric host addresses” option. 313 1.1 christos Output all host addresses in dotted-quad numeric format rather than 314 1.1 christos converting to the canonical host names. 315 1.1 christos <div class="node"> 316 1.1 christos <p><hr> 317 1.1 christos <a name="ntpdc-peers"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-showpeers">ntpdc showpeers</a>, 318 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-numeric">ntpdc numeric</a>, 319 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 320 1.1 christos <br> 321 1.1 christos </div> 322 1.1 christos 323 1.1 christos <h4 class="subsection">peers option (-p)</h4> 324 1.1 christos 325 1.1 christos <p><a name="index-ntpdc_002dpeers-10"></a> 326 1.1 christos This is the “print a list of the peers” option. 327 1.1 christos 328 1.1 christos <p class="noindent">This option has some usage constraints. It: 329 1.1 christos <ul> 330 1.1 christos <li>must not appear in combination with any of the following options: 331 1.1 christos command. 332 1.1 christos </ul> 333 1.1 christos 334 1.1 christos <p>Print a list of the peers known to the server as well as a summary 335 1.1 christos of their state. This is equivalent to the 'peers' interactive command. 336 1.1 christos <div class="node"> 337 1.1 christos <p><hr> 338 1.1 christos <a name="ntpdc-showpeers"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-config">ntpdc config</a>, 339 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-peers">ntpdc peers</a>, 340 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 341 1.1 christos <br> 342 1.1 christos </div> 343 1.1 christos 344 1.1 christos <h4 class="subsection">showpeers option (-s)</h4> 345 1.1 christos 346 1.1 christos <p><a name="index-ntpdc_002dshowpeers-11"></a> 347 1.1 christos This is the “show a list of the peers” option. 348 1.1 christos 349 1.1 christos <p class="noindent">This option has some usage constraints. It: 350 1.1 christos <ul> 351 1.1 christos <li>must not appear in combination with any of the following options: 352 1.1 christos command. 353 1.1 christos </ul> 354 1.1 christos 355 1.1 christos <p>Print a list of the peers known to the server as well as a summary 356 1.1 christos of their state. This is equivalent to the 'dmpeers' interactive command. 357 1.1 christos 358 1.1 christos <div class="node"> 359 1.1 christos <p><hr> 360 1.1 christos <a name="ntpdc-config"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-exit-status">ntpdc exit status</a>, 361 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-showpeers">ntpdc showpeers</a>, 362 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 363 1.1 christos <br> 364 1.1 christos </div> 365 1.1 christos 366 1.1 christos <h4 class="subsection">presetting/configuring ntpdc</h4> 367 1.1 christos 368 1.1 christos <p>Any option that is not marked as <i>not presettable</i> may be preset by 369 1.1 christos 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 370 1.1 christos the options listed above in upper case and segmented with underscores. 371 1.1 christos The <code>NTPDC</code> variable will be tokenized and parsed like 372 1.1 christos the command line. The remaining variables are tested for existence and their 373 1.1 christos values are treated like option arguments. 374 1.1 christos 375 1.1 christos <p class="noindent"><code>libopts</code> will search in 2 places for configuration files: 376 1.1 christos <ul> 377 1.1 christos <li>$HOME 378 1.1 christos <li>$PWD 379 1.1 christos </ul> 380 1.1 christos The environment variables <code>HOME</code>, and <code>PWD</code> 381 1.1 christos are expanded and replaced when <span class="file">ntpdc</span> runs. 382 1.1 christos For any of these that are plain files, they are simply processed. 383 1.1 christos For any that are directories, then a file named <span class="file">.ntprc</span> is searched for 384 1.1 christos within that directory and processed. 385 1.1 christos 386 1.1 christos <p>Configuration files may be in a wide variety of formats. 387 1.1 christos The basic format is an option name followed by a value (argument) on the 388 1.1 christos same line. Values may be separated from the option name with a colon, 389 1.1 christos equal sign or simply white space. Values may be continued across multiple 390 1.1 christos lines by escaping the newline with a backslash. 391 1.1 christos 392 1.1 christos <p>Multiple programs may also share the same initialization file. 393 1.1 christos Common options are collected at the top, followed by program specific 394 1.1 christos segments. The segments are separated by lines like: 395 1.1 christos <pre class="example"> [NTPDC] 396 1.1 christos </pre> 397 1.1 christos <p class="noindent">or by 398 1.1 christos <pre class="example"> <?program ntpdc> 399 1.1 christos </pre> 400 1.1 christos <p class="noindent">Do not mix these styles within one configuration file. 401 1.1 christos 402 1.1 christos <p>Compound values and carefully constructed string values may also be 403 1.1 christos specified using XML syntax: 404 1.1 christos <pre class="example"> <option-name> 405 1.1 christos <sub-opt>...&lt;...&gt;...</sub-opt> 406 1.1 christos </option-name> 407 1.1 christos </pre> 408 1.1 christos <p class="noindent">yielding an <code>option-name.sub-opt</code> string value of 409 1.1 christos <pre class="example"> "...<...>..." 410 1.1 christos </pre> 411 1.1 christos <p><code>AutoOpts</code> does not track suboptions. You simply note that it is a 412 1.1 christos hierarchicly valued option. <code>AutoOpts</code> does provide a means for searching 413 1.1 christos the associated name/value pair list (see: optionFindValue). 414 1.1 christos 415 1.1 christos <p>The command line options relating to configuration and/or usage help are: 416 1.1 christos 417 1.1 christos <h5 class="subsubheading">version (-)</h5> 418 1.1 christos 419 1.1 christos <p>Print the program version to standard out, optionally with licensing 420 1.1 christos information, then exit 0. The optional argument specifies how much licensing 421 1.1 christos detail to provide. The default is to print just the version. The licensing infomation may be selected with an option argument. 422 1.1 christos Only the first letter of the argument is examined: 423 1.1 christos 424 1.1 christos <dl> 425 1.1 christos <dt><span class="samp">version</span><dd>Only print the version. This is the default. 426 1.1 christos <br><dt><span class="samp">copyright</span><dd>Name the copyright usage licensing terms. 427 1.1 christos <br><dt><span class="samp">verbose</span><dd>Print the full copyright usage licensing terms. 428 1.1 christos </dl> 429 1.1 christos 430 1.1 christos <div class="node"> 431 1.1 christos <p><hr> 432 1.1 christos <a name="ntpdc-exit-status"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-Usage">ntpdc Usage</a>, 433 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-config">ntpdc config</a>, 434 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 435 1.1 christos <br> 436 1.1 christos </div> 437 1.1 christos 438 1.1 christos <h4 class="subsection">ntpdc exit status</h4> 439 1.1 christos 440 1.1 christos <p>One of the following exit values will be returned: 441 1.1 christos <dl> 442 1.1 christos <dt><span class="samp">0 (EXIT_SUCCESS)</span><dd>Successful program execution. 443 1.1 christos <br><dt><span class="samp">1 (EXIT_FAILURE)</span><dd>The operation failed or the command syntax was not valid. 444 1.1 christos <br><dt><span class="samp">66 (EX_NOINPUT)</span><dd>A specified configuration file could not be loaded. 445 1.1 christos <br><dt><span class="samp">70 (EX_SOFTWARE)</span><dd>libopts had an internal operational error. Please report 446 1.1 christos it to autogen-users (a] lists.sourceforge.net. Thank you. 447 1.1 christos </dl> 448 1.1 christos <div class="node"> 449 1.1 christos <p><hr> 450 1.1 christos <a name="ntpdc-Usage"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-See-Also">ntpdc See Also</a>, 451 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-exit-status">ntpdc exit status</a>, 452 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 453 1.1 christos <br> 454 1.1 christos </div> 455 1.1 christos 456 1.1 christos <h4 class="subsection">ntpdc Usage</h4> 457 1.1 christos 458 1.1 christos <div class="node"> 459 1.1 christos <p><hr> 460 1.1 christos <a name="ntpdc-See-Also"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-Authors">ntpdc Authors</a>, 461 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-Usage">ntpdc Usage</a>, 462 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 463 1.1 christos <br> 464 1.1 christos </div> 465 1.1 christos 466 1.1 christos <h4 class="subsection">ntpdc See Also</h4> 467 1.1 christos 468 1.1 christos <div class="node"> 469 1.1 christos <p><hr> 470 1.1 christos <a name="ntpdc-Authors"></a>Next: <a rel="next" accesskey="n" href="#ntpdc-Bugs">ntpdc Bugs</a>, 471 1.1 christos Previous: <a rel="previous" accesskey="p" href="#ntpdc-See-Also">ntpdc See Also</a>, 472 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 473 1.1 christos <br> 474 1.1 christos </div> 475 1.1 christos 476 1.1 christos <h4 class="subsection">ntpdc Authors</h4> 477 1.1 christos 478 1.1 christos <div class="node"> 479 1.1 christos <p><hr> 480 1.1 christos <a name="ntpdc-Bugs"></a>Previous: <a rel="previous" accesskey="p" href="#ntpdc-Authors">ntpdc Authors</a>, 481 1.1 christos Up: <a rel="up" accesskey="u" href="#ntpdc-Invocation">ntpdc Invocation</a> 482 1.1 christos <br> 483 1.1 christos </div> 484 1.1 christos 485 1.1 christos <h4 class="subsection">ntpdc Bugs</h4> 486 1.1 christos 487 1.1 christos <div class="node"> 488 1.1 christos <p><hr> 489 1.1 christos <a name="Usage"></a> 490 1.1 christos <br> 491 1.1 christos </div> 492 1.1 christos 493 1.1 christos <!-- node-name, next, previous, up --> 494 1.1 christos <h3 class="section">Usage</h3> 495 1.1 christos 496 1.1 christos <p>The simplest use of this program is as an unprivileged command to 497 1.1 christos check the current time, offset, and error in the local clock. 498 1.1 christos For example: 499 1.1 christos 500 1.1 christos <pre class="example"> ntpdc ntpserver.somewhere 501 1.1 christos </pre> 502 1.1 christos <p>With suitable privilege, it can be run as a command or in a 503 1.1 christos <code>cron</code> job to reset the local clock from a reliable server, like 504 1.1 christos the <code>ntpdate</code> and <code>rdate</code> commands. 505 1.1 christos For example: 506 1.1 christos 507 1.1 christos <pre class="example"> ntpdc -a ntpserver.somewhere 508 1.1 christos </pre> 509 1.1 christos </body></html> 510 1.1 christos 511
Indexes created Thu Jul 16 00:26:27 UTC 2026