Linux Date Command Detailed

1. Display time

The date command displays dates in the specified format, and only date displays the current time in the default format. As follows:

If you need to display the date in the specified format, you can use a string that begins with "+" to specify its format, in the following format:

%n: Next line
%t: Skip grid
% H: Hours (00-23)
%I: Hours (01-12)
%k: Hours (0-23)
% L: Hours (1-12)
% M: minutes (00-5 9)
%p: Show local AM or PM
%r: Show time directly (12-hour format, Hh:mm:ss [ap]m)
%s: Seconds from January 1, 1970 00:00:00 UTC
% s: Seconds (00-60)
% T: Direct display time (24 hours)
% X: equivalent to%h:%m:%s
%Z: Display time zone
% A: Days of the Week (SUN-SAT)
% A: Day of the Week (Sunday-saturday)
%b: Month (JAN-DEC)
% B: Month (january-december)
%c: Display date and time directly
%d: Day (01-31)
% d: Show date directly (MM/DD/YY)
%h: Same as%b
%j: Day of the Year (001-366)
%m: Month (01-12)
% U: Week of the Year (00-53) (with Sunday as the first day of the week)
%w: Day of the Week (0-6)
% W: Week of the Year (00-53) (in case of Monday as the first day of the week)
%x: Display date directly (MM/DD/YY)
%y: Last two digits of year (00.99)
% y: Full year (0000-9999)

These formats do not have to be remembered, only a few common ones. For example %Y represents the year ,%m represents the month ,%d represents the day ,%H represents the hour ,%m Represents minutes ,%s represents seconds , and%s represents the number of seconds from January 1, 1970 00:00:00 UTC to date, equivalent to the time function , C14>%w represents the day ordinal of a week.

See the example below:

If the time to display is not the current time, but the elapsed time, you can use the- d option. For example, show time three years ago:

See this command I was very hurt, the past time can no longer go back, can only use the command to see. Displays the time after three months:

Show time after 10 days:

Sometimes you need to get the number of seconds that the current time is away from 1970 0:0 0 seconds, stored in the variable:

2. Set the time

Use the- s option to set the system time:

There are a variety of ways to choose from:

You need to believe in the intelligence of date enough.

More places to use:

Use the date command to get the current date and create a new folder based on that date.

Linux Date Command Detailed