Linux Date/hwclock commands

Date specifies a specific format for displaying the current time or setting the system time

-D,--date=string the time given a string and then displays it in a specific format

Date-d 2016-11-04 +%a
Date--date 2016-11-04 +%a

-F,--file=datefile displays each line in the file in a specific time format

Date-f file +%a

-R,--reference=file displays the last modified time of the file

-R,--rfc-2822 display time in RFC 2822 format

-S,--set=string set the system time

Date-s 20161101

Date-s 2016-11-01

Date-s 15:15:02

Date-s ' 20161101 15:15:02 '

-U,--UTC,--universal set UTC time, World Time Coordinated,utc, UTC equals the average sun on the Prime meridian (that is, longitude 0 degrees), used to mean GMT (GMT) in the past. to represent. Beijing time is 8 hours earlier than UTC time, with January 1, 1999 0000UTC as an example, UTC time is 0 points, and Beijing time is January 1, 1999 8 o'clock in the morning.

Hwclock Set hardware time (RTC)

-R,--show display system time
-W,--SYSTOHC synchronizes system time to hardware time
-S,--hctosys Synchronize hardware time to System time
-V,--version displays version information for Hwclock
--set--date=newdate Setting Hardware time

command can also synchronize the time between the system and the hardware

Clock-w synchronizing system time to hardware time
Clock-s synchronizing hardware time to System time

Linux Date/hwclock commands