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.

OPTIONS

       The following options are understood:

       -h, --help
	   Prints a short help text and exits.

       --version
	   Prints a short version string and exits.

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

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

       -P, --privileged
	   Acquire privileges via PolicyKit before executing the operation.

       -H, --host
	   Execute the operation remotely. Specify a hostname, or username and hostname separated by "@", to connect to. This will use SSH to talk
	   to a remote system.

       --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.

       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.

       set-local-rtc [BOOL]
	   Takes a boolean argument. If "0", the system is configured to maintain the RTC in universal time. If "1", 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 --adjust-system-clock is passed (see above). This command will change the 3rd line of
	   /etc/adjtime, as documented in hwclock(8).

       set-ntp [BOOL]
	   Takes a boolean argument. Controls whether NTP based network time synchronization is enabled (if available).

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.

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 208															    TIMEDATECTL(1)