74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering<?xml version='1.0'?> <!--*-nxml-*-->

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74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering<refentry id="timedatectl" conditional='ENABLE_TIMEDATED'>

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <refentryinfo>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <title>timedatectl</title>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <productname>systemd</productname>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <authorgroup>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <author>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <contrib>Developer</contrib>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <firstname>Lennart</firstname>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <surname>Poettering</surname>

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering <email>lennart@poettering.net</email>

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering </author>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering </authorgroup>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering </refentryinfo>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen <refmeta>

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen <refentrytitle>timedatectl</refentrytitle>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering <manvolnum>1</manvolnum>

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering </refmeta>

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering <refnamediv>

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering <refname>timedatectl</refname>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <refpurpose>Control the system time and date</refpurpose>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering </refnamediv>

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen <refsynopsisdiv>

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen <cmdsynopsis>

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering <command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering </cmdsynopsis>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering </refsynopsisdiv>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <refsect1>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <title>Description</title>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <para><command>timedatectl</command> may be used to

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering query and change the system clock and its

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering settings.</para>

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering </refsect1>

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering <refsect1>

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen <title>Options</title>

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering <para>The following options are understood:</para>

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen <variablelist>

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen <varlistentry>

8300ba218e3cf5049496937be8bce10f22d09bbcTom Gundersen <term><option>-h</option></term>

8300ba218e3cf5049496937be8bce10f22d09bbcTom Gundersen <term><option>--help</option></term>

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt

<listitem><para>Prints a short help

text and exits.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>--version</option></term>

<listitem><para>Prints a short version

string and exits.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>--no-pager</option></term>

<listitem><para>Do not pipe output into a

pager.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>--no-ask-password</option></term>

<listitem><para>Do not query the user

for authentication for privileged

operations.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>-H</option></term>

<term><option>--host=</option></term>

<listitem><para>Execute operation

remotely. Specify a hostname, or

username and hostname separated by <literal>@</literal>,

to connect to. This will use SSH to

talk to the remote machine manager

instance.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>-M</option></term>

<term><option>--machine=</option></term>

<listitem><para>Execute operation on a

local container. Specify a container

name to connect to.</para></listitem>

</varlistentry>

<varlistentry>

<term><option>--adjust-system-clock</option></term>

<listitem><para>If

<command>set-local-rtc</command> is

invoked and this option is passed, the

system clock is synchronized from the

RTC again, taking the new setting into

account. Otherwise, the RTC is

synchronized from the system

clock.</para></listitem>

</varlistentry>

</variablelist>

<para>The following commands are understood:</para>

<variablelist>

<varlistentry>

<term><command>status</command></term>

<listitem><para>Show current settings

of the system clock and

RTC.</para></listitem>

</varlistentry>

<varlistentry>

<term><command>set-time [TIME]</command></term>

<listitem><para>Set the system clock

to the specified time. This will also

update the RTC time accordingly. The time

may be specified in the format

"2012-10-30

18:17:16".</para></listitem>

</varlistentry>

<varlistentry>

<term><command>set-timezone [TIMEZONE]</command></term>

<listitem><para>Set the system time

zone to the specified value. Available

timezones can be listed with

<command>list-timezones</command>. If

the RTC is configured to be in the

local time, this will also update the

RTC time. This call will alter the

<filename>/etc/localtime</filename>

symlink. See

<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>

for more

information.</para></listitem>

</varlistentry>

<varlistentry>

<term><command>list-timezones</command></term>

<listitem><para>List available time

zones, one per line. Entries from the

list can be set as the system

timezone with

<command>set-timezone</command>.</para></listitem>

</varlistentry>

<varlistentry>

<term><command>set-local-rtc [BOOL]</command></term>

<listitem><para>Takes a boolean

argument. If <literal>0</literal>, the

system is configured to maintain the

RTC in universal time. If

<literal>1</literal>, it will maintain

the RTC in local time instead. Note

that maintaining the RTC in the local

timezone is not fully supported and

will create various problems with time

zone changes and daylight saving

adjustments. If at all possible, keep the

RTC in UTC mode. Note that invoking this

will also synchronize the RTC from the

system clock, unless

<option>--adjust-system-clock</option> is

passed (see above). This command will

change the 3rd line of

<filename>/etc/adjtime</filename>, as

documented in

<citerefentry><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para></listitem>

</varlistentry>

<varlistentry>

<term><command>set-ntp [BOOL]</command></term>

<listitem><para>Takes a boolean

argument. Controls whether NTP based

network time synchronization is

enabled (if

available).</para></listitem>

</varlistentry>

</variablelist>

</refsect1>

<refsect1>

<title>Exit status</title>

<para>On success 0 is returned, a non-zero failure

code otherwise.</para>

</refsect1>

<refsect1>

<title>Environment</title>

<variablelist class='environment-variables'>

<varlistentry>

<term><varname>$SYSTEMD_PAGER</varname></term>

<listitem><para>Pager to use when

<option>--no-pager</option> is not given;

overrides <varname>$PAGER</varname>. Setting

this to an empty string or the value

<literal>cat</literal> is equivalent to passing

<option>--no-pager</option>.</para></listitem>

</varlistentry>

</variablelist>

</refsect1>

<refsect1>

<title>Examples</title>

<para>Show current settings:

<programlisting>

$ timedatectl

Local time: Fri, 2012-11-02 09:26:46 CET

Universal time: Fri, 2012-11-02 08:26:46 UTC

RTC time: Fri, 2012-11-02 08:26:45

Timezone: Europe/Warsaw

UTC offset: +0100

NTP enabled: no

NTP synchronized: no

RTC in local TZ: no

DST active: no

Last DST change: CEST → CET, DST became inactive

Sun, 2012-10-28 02:59:59 CEST

Sun, 2012-10-28 02:00:00 CET

Next DST change: CET → CEST, DST will become active

the clock will jump one hour forward

Sun, 2013-03-31 01:59:59 CET

Sun, 2013-03-31 03:00:00 CEST

</programlisting>

</para>

<para>Enable an NTP daemon (chronyd):

<programlisting>

$ timedatectl set-ntp true

==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp ===

Authentication is required to control whether network time synchronization shall be enabled.

Authenticating as: user

Password: ********

==== AUTHENTICATION COMPLETE ===

</programlisting>

<programlisting>

$ systemctl status chronyd.service

chronyd.service - NTP client/server

Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled)

Active: active (running) since Fri, 2012-11-02 09:36:25 CET; 5s ago

...

</programlisting>

</para>

</refsect1>

<refsect1>

<title>See Also</title>

<para>

<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

<citerefentry><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,

<citerefentry><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

<citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>

</para>

</refsect1>

</refentry>