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

复制代码代码如下:
$ date +%Y%m%d
20150107

2.年月日，年只保留后两位

复制代码代码如下:
~$ date +%y%m%d
150107

3.小时分钟秒

复制代码代码如下:
~$ date +%H%M%S
233045

4.年月日时分秒

复制代码代码如下:
~$ date +%Y%m%d%H%M%S
20150107233145