Annotation of embedaddon/ntp/ntpq/ntpq.1, revision 1.1.1.1
1.1 misho 1: .TH NTPQ 1 2011-12-24 "( 4.2.6p5)" "Programmer's Manual"
2: .\" EDIT THIS FILE WITH CAUTION (ntpq.1)
3: .\"
4: .\" It has been AutoGen-ed December 24, 2011 at 06:34:35 PM by AutoGen 5.12
5: .\" From the definitions ntpq-opts.def
6: .\" and the template file agman1.tpl
7: .\"
8: .SH NAME
9: ntpq \- standard NTP query program
10: .SH SYNOPSIS
11: .B ntpq
12: .\" Mixture of short (flag) options and long options
13: .RB [ \-\fIflag\fP " [\fIvalue\fP]]... [" \--\fIopt-name\fP " [[=| ]\fIvalue\fP]]..."
14: .br
15: .in +8
16: [ host ...]
17: .SH "DESCRIPTION"
18: This manual page briefly documents the \fBntpq\fP command.
19: The
20: [= prog-name =]
21: utility program is used to query NTP servers which
22: implement the standard NTP mode 6 control message formats defined
23: in Appendix B of the NTPv3 specification RFC1305, requesting
24: information about current state and/or changes in that state.
25: The same formats are used in NTPv4, although some of the
26: variables have changed and new ones added. The description on this
27: page is for the NTPv4 variables.
28: The program may be run either in interactive mode or controlled using
29: command line arguments.
30: Requests to read and write arbitrary
31: variables can be assembled, with raw and pretty-printed output
32: options being available.
33: The
34: [= prog-name =]
35: utility can also obtain and print a
36: list of peers in a common format by sending multiple queries to the
37: server.
38:
39: If one or more request options is included on the command line
40: when
41: [= prog-name =]
42: is executed, each of the requests will be sent
43: to the NTP servers running on each of the hosts given as command
44: line arguments, or on localhost by default.
45: If no request options
46: are given,
47: [= prog-name =]
48: will attempt to read commands from the
49: standard input and execute these on the NTP server running on the
50: first host given on the command line, again defaulting to localhost
51: when no other host is specified.
52: The
53: [= prog-name =]
54: utility will prompt for
55: commands if the standard input is a terminal device.
56:
57: The
58: [= prog-name =]
59: utility uses NTP mode 6 packets to communicate with the
60: NTP server, and hence can be used to query any compatible server on
61: the network which permits it.
62: Note that since NTP is a UDP protocol
63: this communication will be somewhat unreliable, especially over
64: large distances in terms of network topology.
65: The
66: [= prog-name =]
67: utility makes
68: one attempt to retransmit requests, and will time requests out if
69: the remote host is not heard from within a suitable timeout
70: time.
71:
72: Specifying a
73: command line option other than
74: .Fl i
75: or
76: .Fl n
77: will
78: cause the specified query (queries) to be sent to the indicated
79: host(s) immediately.
80: Otherwise,
81: [= prog-name =]
82: will attempt to read
83: interactive format commands from the standard input.
84: .Ss "Internal Commands"
85: Interactive format commands consist of a keyword followed by zero
86: to four arguments.
87: Only enough characters of the full keyword to
88: uniquely identify the command need be typed.
89:
90: A
91: number of interactive format commands are executed entirely within
92: the
93: [= prog-name =]
94: utility itself and do not result in NTP mode 6
95: requests being sent to a server.
96: These are described following.
97: .sp
98: .IR "? [command_keyword]"
99: .sp 1x help [command_keyword]
100: A
101: .Ql \&?
102: by itself will print a list of all the command
103: keywords known to this incarnation of
104: [= prog-name =] .
105: A
106: .Ql \&?
107: followed by a command keyword will print function and usage
108: information about the command.
109: This command is probably a better
110: source of information about
111: [= prog-name =]
112: than this manual
113: page.
114: .sp
115: .IR "addvars"
116: .Ar variable_name [=value] ...
117: .Xc
118: .sp
119: .IR "rmvars variable_name ..."
120: .sp
121: .IR "clearvars"
122: The data carried by NTP mode 6 messages consists of a list of
123: items of the form
124: .Ql variable_name=value ,
125: where the
126: .Ql =value
127: is ignored, and can be omitted,
128: in requests to the server to read variables.
129: The
130: [= prog-name =]
131: utility maintains an internal list in which data to be included in control
132: messages can be assembled, and sent using the
133: .Ic readlist
134: and
135: .Ic writelist
136: commands described below.
137: The
138: .Ic addvars
139: command allows variables and their optional values to be added to
140: the list.
141: If more than one variable is to be added, the list should
142: be comma-separated and not contain white space.
143: The
144: .Ic rmvars
145: command can be used to remove individual variables from the list,
146: while the
147: .Ic clearlist
148: command removes all variables from the
149: list.
150: .sp
151: .IR "authenticate [ yes | no ]"
152: Normally
153: [= prog-name =]
154: does not authenticate requests unless
155: they are write requests.
156: The command
157: .Ql authenticate yes
158: causes
159: [= prog-name =]
160: to send authentication with all requests it
161: makes.
162: Authenticated requests causes some servers to handle
163: requests slightly differently, and can occasionally melt the CPU in
164: fuzzballs if you turn authentication on before doing a
165: .Ic peer
166: display.
167: The command
168: .Ql authenticate
169: causes
170: [= prog-name =]
171: to display whether or not
172: [= prog-name =]
173: is currently autheinticating requests.
174: .sp
175: .IR "cooked"
176: Causes output from query commands to be "cooked", so that
177: variables which are recognized by
178: [= prog-name =]
179: will have their
180: values reformatted for human consumption.
181: Variables which
182: [= prog-name =]
183: thinks should have a decodable value but didn't are
184: marked with a trailing
185: .Ql \&? .
186: .@item debug [
187: .Cm more |
188: .Cm less |
189: .Cm off
190: ]
191: .Xc
192: With no argument, displays the current debug level.
193: Otherwise, the debug level is changed to the indicated level.
194: .sp
195: .IR "delay milliseconds"
196: Specify a time interval to be added to timestamps included in
197: requests which require authentication.
198: This is used to enable
199: (unreliable) server reconfiguration over long delay network paths
200: or between machines whose clocks are unsynchronized.
201: Actually the
202: server does not now require timestamps in authenticated requests,
203: so this command may be obsolete.
204: .sp
205: .IR "host hostname"
206: Set the host to which future queries will be sent.
207: Hostname may
208: be either a host name or a numeric address.
209: .sp
210: .IR "hostnames Cm yes | Cm no"
211: If
212: .Cm yes
213: is specified, host names are printed in
214: information displays.
215: If
216: .Cm no
217: is specified, numeric
218: addresses are printed instead.
219: The default is
220: .Cm yes ,
221: unless
222: modified using the command line
223: .Fl n
224: switch.
225: .sp
226: .IR "keyid keyid"
227: This command allows the specification of a key number to be
228: used to authenticate configuration requests.
229: This must correspond
230: to a key number the server has been configured to use for this
231: purpose.
232: .sp
233: .IR "ntpversion ["
234: .Cm 1 |
235: .Cm 2 |
236: .Cm 3 |
237: .Cm 4
238: ]
239: .Xc
240: Sets the NTP version number which
241: [= prog-name =]
242: claims in
243: packets.
244: Defaults to 3, Note that mode 6 control messages (and
245: modes, for that matter) didn't exist in NTP version 1.
246: There appear
247: to be no servers left which demand version 1.
248: With no argument, displays the current NTP version that will be used
249: when communicating with servers.
250: .sp
251: .IR "quit"
252: Exit
253: [= prog-name =] .
254: .sp
255: .IR "passwd"
256: This command prompts you to type in a password (which will not
257: be echoed) which will be used to authenticate configuration
258: requests.
259: The password must correspond to the key configured for
260: use by the NTP server for this purpose if such requests are to be
261: successful.
262: .sp
263: .IR "raw"
264: Causes all output from query commands is printed as received
265: from the remote server.
266: The only formating/interpretation done on
267: the data is to transform nonascii data into a printable (but barely
268: understandable) form.
269: .sp
270: .IR "timeout Ar milliseconds"
271: Specify a timeout period for responses to server queries.
272: The
273: default is about 5000 milliseconds.
274: Note that since
275: [= prog-name =]
276: retries each query once after a timeout, the total waiting time for
277: a timeout will be twice the timeout value set.
278: .br
279:
280: .SH OPTIONS
281: .TP
282: .BR \-4 ", " \--ipv4
283: Force IPv4 DNS name resolution.
284: This option must not appear in combination with any of the following options:
285: ipv6.
286: .sp
287: Force DNS resolution of following host names on the command line
288: to the IPv4 namespace.
289: .TP
290: .BR \-6 ", " \--ipv6
291: Force IPv6 DNS name resolution.
292: This option must not appear in combination with any of the following options:
293: ipv4.
294: .sp
295: Force DNS resolution of following host names on the command line
296: to the IPv6 namespace.
297: .TP
298: .BR \-c " \fIcmd\fP, " \--command "=" \fIcmd\fP
299: run a command and exit.
300: This option may appear an unlimited number of times.
301: .sp
302: The following argument is interpreted as an interactive format command
303: and is added to the list of commands to be executed on the specified
304: host(s).
305: .TP
306: .BR \-d ", " \--debug-level
307: Increase output debug message level.
308: This option may appear an unlimited number of times.
309: .sp
310: Increase the debugging message output level.
311: .TP
312: .BR \-D " \fIstring\fP, " \--set-debug-level "=" \fIstring\fP
313: Set the output debug message level.
314: This option may appear an unlimited number of times.
315: .sp
316: Set the output debugging level. Can be supplied multiple times,
317: but each overrides the previous value(s).
318: .TP
319: .BR \-p ", " \--peers
320: Print a list of the peers.
321: This option must not appear in combination with any of the following options:
322: interactive.
323: .sp
324: Print a list of the peers known to the server as well as a summary
325: of their state. This is equivalent to the 'peers' interactive command.
326: .TP
327: .BR \-i ", " \--interactive
328: Force ntpq to operate in interactive mode.
329: This option must not appear in combination with any of the following options:
330: command, peers.
331: .sp
332: Force ntpq to operate in interactive mode. Prompts will be written
333: to the standard output and commands read from the standard input.
334: .TP
335: .BR \-n ", " \--numeric
336: numeric host addresses.
337: .sp
338: Output all host addresses in dotted-quad numeric format rather than
339: converting to the canonical host names.
340: .TP
341: .BR \--old-rv
342: Always output status line with readvar.
343: .sp
344: By default, ntpq now suppresses the associd=... line that
345: precedes the output of "readvar" (alias "rv") when a single
346: variable is requested, such as ntpq \-c "rv 0 offset". This
347: option causes ntpq to include both lines of output for a
348: single-variable readvar. Using an environment variable to
349: preset this option in a script will enable both older and
350: newer ntpq to behave identically in this regard.
351: .TP
352: .BR \-? , " \--help"
353: Display extended usage information and exit.
354: .TP
355: .BR \-! , " \--more-help"
356: Extended usage information passed thru pager.
357: .TP
358: .BR \-> " [\fIrcfile\fP]," " \--save-opts" "[=\fIrcfile\fP]"
359: Save the option state to \fIrcfile\fP. The default is the \fIlast\fP
360: configuration file listed in the \fBOPTION PRESETS\fP section, below.
361: .TP
362: .BR \-< " \fIrcfile\fP," " \--load-opts" "=\fIrcfile\fP," " \--no-load-opts"
363: Load options from \fIrcfile\fP.
364: The \fIno-load-opts\fP form will disable the loading
365: of earlier RC/INI files. \fI--no-load-opts\fP is handled early,
366: out of order.
367: .TP
368: .BR \- " [{\fIv|c|n\fP}]," " \--version" "[=\fI{v|c|n}\fP]"
369: Output version of program and exit. The default mode is `v', a simple
370: version. The `c' mode will print copyright information and `n' will
371: print the full copyright notice.
372: .SH OPTION PRESETS
373: Any option that is not marked as \fInot presettable\fP may be preset
374: by loading values from configuration ("RC" or ".INI") file(s) and values from
375: environment variables named:
376: .nf
377: \fBNTPQ_<option-name>\fP or \fBNTPQ\fP
378: .fi
379: .ad
380: The environmental presets take precedence (are processed later than)
381: the configuration files.
382: The \fIhomerc\fP files are "\fI$HOME\fP", and "\fI.\fP".
383: If any of these are directories, then the file \fI.ntprc\fP
384: is searched for within those directories.
385: .SH AUTHOR
386: David L. Mills and/or others
387: .br
388: Please send bug reports to: http://bugs.ntp.org, bugs@ntp.org
389:
390: .PP
391: .nf
392: .na
393: see html/copyright.html
394:
395: .fi
396: .ad
397: .PP
398: This manual page was \fIAutoGen\fP-erated from the \fBntpq\fP
399: option definitions.
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