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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
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3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [ |
4 | <!ENTITY % entities SYSTEM "custom-entities.ent" > | |
5 | %entities; | |
6 | ]> | |
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7 | |
8 | <!-- | |
9 | This file is part of systemd. | |
10 | ||
11 | Copyright 2012 Lennart Poettering | |
12 | ||
13 | systemd is free software; you can redistribute it and/or modify it | |
14 | under the terms of the GNU Lesser General Public License as published by | |
15 | the Free Software Foundation; either version 2.1 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | systemd is distributed in the hope that it will be useful, but | |
19 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | Lesser General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU Lesser General Public License | |
24 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
25 | --> | |
26 | ||
21ac6ff1 | 27 | <refentry id="timedatectl" conditional='ENABLE_TIMEDATED' |
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28 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
29 | ||
30 | <refentryinfo> | |
31 | <title>timedatectl</title> | |
32 | <productname>systemd</productname> | |
33 | ||
34 | <authorgroup> | |
35 | <author> | |
36 | <contrib>Developer</contrib> | |
37 | <firstname>Lennart</firstname> | |
38 | <surname>Poettering</surname> | |
39 | <email>lennart@poettering.net</email> | |
40 | </author> | |
41 | </authorgroup> | |
42 | </refentryinfo> | |
43 | ||
44 | <refmeta> | |
45 | <refentrytitle>timedatectl</refentrytitle> | |
46 | <manvolnum>1</manvolnum> | |
47 | </refmeta> | |
48 | ||
49 | <refnamediv> | |
50 | <refname>timedatectl</refname> | |
51 | <refpurpose>Control the system time and date</refpurpose> | |
52 | </refnamediv> | |
53 | ||
54 | <refsynopsisdiv> | |
55 | <cmdsynopsis> | |
56 | <command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command> | |
57 | </cmdsynopsis> | |
58 | </refsynopsisdiv> | |
59 | ||
60 | <refsect1> | |
61 | <title>Description</title> | |
62 | ||
63 | <para><command>timedatectl</command> may be used to query and | |
64 | change the system clock and its settings.</para> | |
65 | ||
66 | <para>Use | |
67 | <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
68 | to initialize the system time zone for mounted (but not booted) | |
69 | system images.</para> | |
70 | </refsect1> | |
71 | ||
72 | <refsect1> | |
73 | <title>Options</title> | |
74 | ||
75 | <para>The following options are understood:</para> | |
76 | ||
77 | <variablelist> | |
78 | <varlistentry> | |
79 | <term><option>--no-ask-password</option></term> | |
80 | ||
81 | <listitem><para>Do not query the user for authentication for | |
82 | privileged operations.</para></listitem> | |
83 | </varlistentry> | |
84 | ||
85 | <varlistentry> | |
86 | <term><option>--adjust-system-clock</option></term> | |
87 | ||
88 | <listitem><para>If <command>set-local-rtc</command> is invoked | |
89 | and this option is passed, the system clock is synchronized | |
90 | from the RTC again, taking the new setting into account. | |
91 | Otherwise, the RTC is synchronized from the system | |
92 | clock.</para></listitem> | |
93 | </varlistentry> | |
94 | ||
95 | <xi:include href="user-system-options.xml" xpointer="host" /> | |
96 | <xi:include href="user-system-options.xml" xpointer="machine" /> | |
97 | ||
98 | <xi:include href="standard-options.xml" xpointer="help" /> | |
99 | <xi:include href="standard-options.xml" xpointer="version" /> | |
100 | <xi:include href="standard-options.xml" xpointer="no-pager" /> | |
101 | </variablelist> | |
102 | ||
103 | <para>The following commands are understood:</para> | |
104 | ||
105 | <variablelist> | |
106 | <varlistentry> | |
107 | <term><command>status</command></term> | |
108 | ||
ff5921ba | 109 | <listitem><para>Show current settings of the system clock and |
2fc4f5bd | 110 | RTC, including whether network time synchronization is |
b90930c7 | 111 | on. Note that whether network time synchronization is on |
ff5921ba | 112 | simply reflects whether the |
57506e7d | 113 | <filename>systemd-timesyncd.service</filename> unit is |
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114 | enabled. Even if this command shows the status as off a |
115 | different service might still synchronize the clock with the | |
2fc4f5bd | 116 | network.</para></listitem> |
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117 | </varlistentry> |
118 | ||
119 | <varlistentry> | |
120 | <term><command>set-time [TIME]</command></term> | |
121 | ||
122 | <listitem><para>Set the system clock to the specified time. | |
123 | This will also update the RTC time accordingly. The time may | |
124 | be specified in the format "2012-10-30 | |
125 | 18:17:16".</para></listitem> | |
126 | </varlistentry> | |
127 | ||
128 | <varlistentry> | |
129 | <term><command>set-timezone [TIMEZONE]</command></term> | |
130 | ||
131 | <listitem><para>Set the system time zone to the specified | |
132 | value. Available timezones can be listed with | |
133 | <command>list-timezones</command>. If the RTC is configured to | |
134 | be in the local time, this will also update the RTC time. This | |
135 | call will alter the <filename>/etc/localtime</filename> | |
136 | symlink. See | |
137 | <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
138 | for more information.</para></listitem> | |
139 | </varlistentry> | |
140 | ||
141 | <varlistentry> | |
142 | <term><command>list-timezones</command></term> | |
143 | ||
144 | <listitem><para>List available time zones, one per line. | |
145 | Entries from the list can be set as the system timezone with | |
146 | <command>set-timezone</command>.</para></listitem> | |
147 | </varlistentry> | |
148 | ||
149 | <varlistentry> | |
150 | <term><command>set-local-rtc [BOOL]</command></term> | |
151 | ||
152 | <listitem><para>Takes a boolean argument. If | |
153 | <literal>0</literal>, the system is configured to maintain the | |
154 | RTC in universal time. If <literal>1</literal>, it will | |
155 | maintain the RTC in local time instead. Note that maintaining | |
156 | the RTC in the local timezone is not fully supported and will | |
157 | create various problems with time zone changes and daylight | |
158 | saving adjustments. If at all possible, keep the RTC in UTC | |
159 | mode. Note that invoking this will also synchronize the RTC | |
160 | from the system clock, unless | |
161 | <option>--adjust-system-clock</option> is passed (see above). | |
162 | This command will change the 3rd line of | |
163 | <filename>/etc/adjtime</filename>, as documented in | |
164 | <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>. | |
165 | </para></listitem> | |
166 | </varlistentry> | |
167 | ||
168 | <varlistentry> | |
169 | <term><command>set-ntp [BOOL]</command></term> | |
170 | ||
2fc4f5bd | 171 | <listitem><para>Takes a boolean argument. Controls whether |
b90930c7 | 172 | network time synchronization is enabled (if available). This |
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173 | enables or disables the |
174 | <filename>systemd-timesyncd.service</filename> unit. Note that | |
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175 | even if this command turns time synchronization off a |
176 | different system service might still synchronize the clock | |
177 | with the network.</para></listitem> | |
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178 | </varlistentry> |
179 | ||
180 | </variablelist> | |
181 | ||
182 | </refsect1> | |
183 | ||
184 | <refsect1> | |
185 | <title>Exit status</title> | |
186 | ||
187 | <para>On success, 0 is returned, a non-zero failure | |
188 | code otherwise.</para> | |
189 | </refsect1> | |
190 | ||
191 | <xi:include href="less-variables.xml" /> | |
192 | ||
193 | <refsect1> | |
194 | <title>Examples</title> | |
195 | <para>Show current settings: | |
196 | <programlisting>$ timedatectl | |
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197 | Local time: Di 2015-04-07 16:26:56 CEST |
198 | Universal time: Di 2015-04-07 14:26:56 UTC | |
199 | RTC time: Di 2015-04-07 14:26:56 | |
200 | Time zone: Europe/Berlin (CEST, +0200) | |
b90930c7 | 201 | Network time on: yes |
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202 | NTP synchronized: yes |
203 | RTC in local TZ: no</programlisting> | |
798d3a52 | 204 | </para> |
be1015dd | 205 | |
b90930c7 | 206 | <para>Enable network time synchronization: |
798d3a52 | 207 | <programlisting>$ timedatectl set-ntp true |
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208 | ==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp === |
209 | Authentication is required to control whether network time synchronization shall be enabled. | |
210 | Authenticating as: user | |
211 | Password: ******** | |
9fccdb0f | 212 | ==== AUTHENTICATION COMPLETE ===</programlisting> |
be1015dd | 213 | |
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214 | <programlisting>$ systemctl status systemd-timesyncd.service |
215 | ● systemd-timesyncd.service - Network Time Synchronization | |
681eb9cf | 216 | Loaded: loaded (&rootlibexecdir;/system/systemd-timesyncd.service; enabled) |
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217 | Active: active (running) since Mo 2015-03-30 14:20:38 CEST; 5s ago |
218 | Docs: man:systemd-timesyncd.service(8) | |
219 | Main PID: 595 (systemd-timesyn) | |
220 | Status: "Using Time Server 216.239.38.15:123 (time4.google.com)." | |
221 | CGroup: /system.slice/systemd-timesyncd.service | |
681eb9cf | 222 | └─595 &rootlibexecdir;/systemd-timesyncd |
9fccdb0f | 223 | ...</programlisting> |
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224 | </para> |
225 | </refsect1> | |
226 | ||
227 | <refsect1> | |
228 | <title>See Also</title> | |
229 | <para> | |
230 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
231 | <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
232 | <citerefentry project='man-pages'><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
233 | <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
234 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
235 | <citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
ff5921ba | 236 | <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
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237 | <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
238 | </para> | |
239 | </refsect1> | |
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240 | |
241 | </refentry> |