Linux命令之日期时间命令date使用实例

date用法1:

       格式：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 (000000000..999999999)

       %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 %h:%m

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

       %s     second (00..60)

       %t     a 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

例如：

1.年月日

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代码如下:

$ date +%y%m%d
20150107

2.年月日，年只保留后两位

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代码如下:

~$ date +%y%m%d
150107

3.小时分钟秒

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代码如下:

~$ date +%h%m%s
233045

4.年月日时分秒

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代码如下:

~$ date +%y%m%d%h%m%s
20150107233145