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使用 date +FORMAT

例如

日期
$ date +"%Y%m%d"
20131401

時間
$ date +"%T"
12:59:33

星期幾
$ date +"%u"
1

將日期格式存成字串

$ NOW=$(date +"%Y%m%d")
$ echo $NOW
20131401


寫成 shell script 檔



所有的日期格式代號：

%%
顯示%符號

%a
星期幾的縮寫 (e.g. Sun)

%A
星期幾 (e.g. Sunday)

%b
月份的縮寫 (e.g., Jan)

%B
月份 (e.g., January)

%c
日期與時間 (e.g., Thu Mar 3 23:05:25 2005)

%C
世紀，%Y的前兩個數字 (e.g., 20)

%d
每月的幾號 (e.g, 01)

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

%e
與%d類似，只是小於10時前面會空一格

%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 ( 0..23)

%l
hour ( 1..12)

%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 timezone (e.g., -0400)

%:z
+hh:mm numeric timezone (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)

--
※ 作者: Knuckles 時間: 2013-01-14 13:05:26
※ 編輯: Knuckles 時間: 2015-10-19 06:58:35