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This article focuses on "examples of the use of date commands in the Linux system". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "the use of date commands in the Linux system examples" it!

Date usage 1:

Format: date [OPTION]... [+ FORMAT]

FORMAT controls the output. Interpreted sequences are:

A literal

% a locale's abbreviated weekday name (e.g., Sun)

% A locale's full weekday name (e.g., Sunday)

% b locale's abbreviated month name (e.g., Jan)

% B locale's full month name (e.g., January)

% c locale's date and time (e.g., Thu Mar 3 23:05:25 2005)

% C century; like% Y, except omit last two digits (e.g.20)

% d day of month (e.g.01)

D date; same as m/%d/%y

E day of month, space padded; same as _ d

F full date; same as Y-%m-%d

G last two digits of year of ISO week number (see G)

G year of ISO week number (see V); normally useful only with V

H same as b

% H hour (00.23)

% I hour (01.. 12)

% j day of year (001.. 366)

% k hour, space padded (0.23); same as% _ H

L hour, space padded (1.. 12); same as% _ I

% m month (01.. 12)

% M minute (00.59)

% n a newline

% N nanoseconds (0000000.9999999999)

% p locale's equivalent of either AM or PM; blank if not known

P like p, but lower case

R locale's 12-hour clock time (e.g., 11:11:04 PM)

% R 24-hour hour and minute; same as% HRV% M

% s seconds since 1970-01-01 00:00:00 UTC

% s second (00.60)

% ta tab

T time; same as H:%M:%S

% u day of week (1.. 7); 1 is Monday

% U week number of year, with Sunday as first day of week (00.53)

% V ISO week number, with Monday as first day of week (01.. 53)

W day of week (0.6); 0 is Sunday

% W week number of year, with Monday as first day of week (00.53)

% x locale's date representation (e.g., 12-31-99)

% X locale's time representation (e.g., 23:13:48)

% y last two digits of year (00.99)

% Y year

% z + hhmm numeric time zone (e.g.,-0400)

%: Z + hh:mm numeric time zone (e.g.,-04:00)

%:: Z + hh:mm:ss numeric time zone (e.g.,-04:00:00)

%:: z numeric time zone with: to necessary precision (e.g.,-04, + 05:30)

% Z alphabetic time zone abbreviation (e.g., EDT)

By default, date pads numeric fields with zeroes. The following optional flags may follow `%':

-(hyphen) do not pad the field

_ (underscore) pad with spaces

0 (zero) pad with zeros

^ use upper case if possible

# use opposite case if possible

For example:

1. Year Month Day

The code is as follows:

$date +% Y%m%d

20150107

two。 On the day of the year, only the last two are retained.

The code is as follows:

~ $date +% y%m%d

150107

3. Hours, minutes, seconds

The code is as follows:

~ $date +% H%M%S

233045

4. Year, month, day, hour, minute and second

The code is as follows:

~ $date +% Y%m%d%H%M%S

20150107233145

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