windtear 追求完美

http://windtear.net/archives/2006/05/28/000993.html

date touch 时间相关

-d, --date=STRING 是 date touch 都支持的

man touch
-d, --date=STRING

-t STAMP
      use [[CC]YY]MMDDhhmm[.ss] instead of current time

--time=WORD
      set  time  given  by  WORD: access atime use (same as -a) modify
      mtime (same as -m)

touch 使用举例：
# touch -d "20040428 01:18:18" test.touch.txt
or
# touch -t 0605281500 test.touch.txt

date 使用举例：
% date
Wed Apr 28 01:17:17 CST 2004

% date --date=yesterday
Tue Apr 27 01:17:40 CST 2004

% date --date=yesterday +%Y%m%d
20040427

% date --date="2 days ago" +%Y%m%d
20040426

% date -s "20040428 01:18:18"

% date -s "01:18:18"

shell:
% date +%s
1128621784

% date -d "1970-01-01 UTC 1128621784 seconds"
Fri Oct  7 02:03:04 CST 2005

perl:
%  perl -e 'print scalar localtime 1128621784'
Fri Oct  7 02:03:04 2005

php:
date('Y-m-d H:i:s',time());

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