Redhat7:date - Revision history

K mouza: /* hwclock command */

2015-02-23T10:04:48Z

hwclock command

K mouza at 10:04, 23 February 2015

2015-02-23T10:04:03Z

K mouza: /* hwclock command */

2015-02-23T09:56:54Z

hwclock command

K mouza at 09:52, 23 February 2015

2015-02-23T09:52:35Z

K mouza: /* timedatectl command */

2015-02-20T17:19:36Z

timedatectl command

K mouza at 17:19, 20 February 2015

2015-02-20T17:19:16Z

Michael: /* timedatectl command */

2015-01-05T10:18:35Z

timedatectl command

Michael: Created page with "== Types of Clocks == There are two separate clocks on a system, and most modern OS's distinguish between them. * ''Real-Time Clock'' - Also know as the hardware clock, this..."

2015-01-05T10:15:50Z

Created page with "== Types of Clocks == There are two separate clocks on a system, and most modern OS's distinguish between them. * ''Real-Time Clock'' - Also know as the hardware clock, this..."

New page

== Types of Clocks ==

There are two separate clocks on a system, and most modern OS's distinguish between them.

* ''Real-Time Clock'' - Also know as the hardware clock, this clock runs independently of the OS, and continues even when the system is shotdown

* ''System Clock'' - Maintained by the kernel of the OS. This can be set to use Univerisal Time (UTC) or the local time. It is recommended to us UTC.

== timedatectl command ==

As with the other ctl command the timedateclt works in a similar way.

<syntaxhighlight>
#Display current time and date
timedatectl
#set date
timedatectl set-time YYYY-MM-DD
#set time
timedatectl set-time HH:MM:SS
# set time zone
timedatectl list-timezones
timedaectl set-timezone time_zone
# Synchronise using ntp
timedatectl set-ntp boolean
</syntaxhighlight>

← Older revision		Revision as of 10:04, 23 February 2015
Line 57:		Line 57:
	hwclock --hctosys --localtime		hwclock --hctosys --localtime

		+	#reboot the system for changes to take effect
		+	reboot
	</syntaxhighlight>		</syntaxhighlight>

← Older revision		Revision as of 10:04, 23 February 2015
Line 40:		Line 40:

	'''Note:''' In Red Hat Enterprise Linux 6, the hwclock command was run automatically on every system shutdown or reboot, but it is not in Red Hat Enterprise Linux 7.		'''Note:''' In Red Hat Enterprise Linux 6, the hwclock command was run automatically on every system shutdown or reboot, but it is not in Red Hat Enterprise Linux 7.
		+
		+	<syntaxhighlight>
		+	#Display current time and date
		+	hwclock
		+	hwclock --utc
		+	hwclock --localtime
		+
		+	#set date and time
		+	hwclock --set --date "dd mmm yyyy HH:MM"
		+
		+	#sync system clock to hw clock
		+	hwclock --systohc --localtime
		+	hwclock --systohc --utc
		+
		+	#sync hw clock to system clock
		+	hwclock --hctosys --localtime
		+
		+	</syntaxhighlight>

← Older revision		Revision as of 09:56, 23 February 2015
Line 38:		Line 38:

	== <tt>hwclock</tt> command ==		== <tt>hwclock</tt> command ==
		+
		+	'''Note:''' In Red Hat Enterprise Linux 6, the hwclock command was run automatically on every system shutdown or reboot, but it is not in Red Hat Enterprise Linux 7.

@@ Line 8: / Line 8: @@
-== timedatectl command ==
+== <tt>timedatectl</tt> command ==
 As with the other ctl command the timedateclt works in a similar way.
@@ Line 26: / Line 26: @@
 </syntaxhighlight>
-== date command ==
+== <tt>date</tt> command ==
 <syntaxhighlight>
@@ Line 36: / Line 36: @@
 date +%T -s HH:MM:SS
 </syntaxhighlight>

← Older revision		Revision as of 17:19, 20 February 2015
Line 28:		Line 28:

	== date command ==		== date command ==
		+
		+	<syntaxhighlight>
		+	#Display current time and date
		+	date --utc
		+	#set date
		+	date +%F -s YYYY-MM-DD
		+	#set time
		+	date +%T -s HH:MM:SS
		+	</syntaxhighlight>

@@ Line 21: / Line 21: @@
 # set time zone
 timedatectl list-timezones
-timedaectl set-timezone time_zone
+timedatectl set-timezone time_zone
 # Synchronise using ntp
 timedatectl set-ntp boolean
 </syntaxhighlight>
 == date command ==

← Older revision		Revision as of 10:18, 5 January 2015
Line 25:		Line 25:
	timedatectl set-ntp boolean		timedatectl set-ntp boolean
	</syntaxhighlight>		</syntaxhighlight>
		+
		+
		+	== date command ==