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TIMEDATECTL(1)                                       timedatectl                                       TIMEDATECTL(1)



NAME
       timedatectl - Control the system time and date

SYNOPSIS
       timedatectl [OPTIONS...] {COMMAND}

DESCRIPTION
       timedatectl may be used to query and change the system clock and its settings.

       Use systemd-firstboot(1) to initialize the system time zone for mounted (but not booted) system images.

OPTIONS
       The following options are understood:

       --no-ask-password
           Do not query the user for authentication for privileged operations.

       --adjust-system-clock
           If set-local-rtc 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.

       -H, --host=
           Execute the operation remotely. Specify a hostname, or a username and hostname separated by "@", to
           connect to. The hostname may optionally be suffixed by a container name, separated by ":", which connects
           directly to a specific container on the specified host. This will use SSH to talk to the remote machine
           manager instance. Container names may be enumerated with machinectl -H HOST.

       -M, --machine=
           Execute operation on a local container. Specify a container name to connect to.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       --no-pager
           Do not pipe output into a pager.

       The following commands are understood:

       status
           Show current settings of the system clock and RTC.

       set-time [TIME]
           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".

       set-timezone [TIMEZONE]
           Set the system time zone to the specified value. Available timezones can be listed with list-timezones. If
           the RTC is configured to be in the local time, this will also update the RTC time. This call will alter
           the /etc/localtime symlink. See localtime(5) for more information.

       list-timezones
           List available time zones, one per line. Entries from the list can be set as the system timezone with
           set-timezone.

EXIT STATUS
       On success, 0 is returned, a non-zero failure code otherwise.

ENVIRONMENT
       $SYSTEMD_PAGER
           Pager to use when --no-pager is not given; overrides $PAGER. Setting this to an empty string or the value
           "cat" is equivalent to passing --no-pager.

       $SYSTEMD_LESS
           Override the default options passed to less ("FRSXMK").

EXAMPLES
       Show current settings:

           $ 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

       Enable an NTP daemon (chronyd):

           $ 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 ===

           $ 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
           ...


SEE ALSO
       systemd(1), hwclock(8), date(1), localtime(5), systemctl(1), systemd-timedated.service(8), systemd-
       firstboot(1)