Linux Date Time command

Date

• Role

System time management, printing or setting the system date and time.

• Options

--help: Displays help information.

--version: Displays version information.

-D: Displays the date and time that the string refers to, and the string must be preceded by a double quotation mark.

-S: Sets the date and time based on the string, and the string must be preceded by double quotation marks.

• Format

%Y: Year.

%y: Year, after two digits.

%m: Month.

%d: day.

%H: Hours, 0-23.

%M: Min, 00-59.

%s: seconds, 00-60.

The%%:% string.

%n: New line.

%d: date, equivalent to%m/%d/%y.

%F: Date, equivalent to%y-%m-%d.

%R: Hours and minutes, equivalent to%h:%m.

Clock

• Role

Hardware time management.

Hwclock:hardware Clock

• Role

Query, set hardware time.

• Options

-S: Synchronizes hardware clock to system time.

--hctosys: Synchronizes the hardware clock to the system clock.

-W: Synchronizes the system clock to the hardware clock.

--SYSTOHC: Synchronizes the system clock to the hardware clock.

Cal:calendar

• Role

Displays the calendar.

• Options

-1: Displays the current month calendar.

-3: Displays the current month and the calendar for each January before and after the current month.

-y: Displays the current year's calendar.

• Parameters

The year to display.

Linux Date Time command